configs/sipeed_licheepi_zero: update Linux, U-Boot to fix build

Since Buildroot commit [1] dc0f7215c6 "package/gcc: switch to 13.x as
default", sipeed_licheepi_zero_defconfig fails when building the Linux
kernel with the error message:

    drivers/ata/libahci.c: In function 'ahci_led_store':
    ./include/linux/compiler.h:350:45: error: call to '__compiletime_assert_1138' declared with attribute error: BUILD_BUG_ON failed: sizeof(_s) > sizeof(long)
      350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)

This issue is fixed by upstream Kernel commit [2].

This commit fixes this issue by updating the Linux Kernel from v5.3.5
(which is not a LTS series) to v6.12.43 (which is a LTS series
including the fixes). With this update,
BR2_LINUX_KERNEL_INTREE_DTS_NAME is updated accordingly to follow the
new DTS organization.

This commit also updates U-Boot from 2022.01 to 2025.07. This new
version now requires BR2_TARGET_UBOOT_NEEDS_GNUTLS=y.

While at it, this commit also switches to a stable glibc Bootlin
external toolchain, to follow the new guidelines from [3].

Finally, this commit adds BR2_DOWNLOAD_FORCE_CHECK_HASHES=y and the
corresponding hash files. The .checkpackageignore is also updated to
reflect that change.

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/11026771001

[1] https://gitlab.com/buildroot.org/buildroot/-/commit/dc0f7215c604e845009e03784a221332867bf35a
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f07788079f515ca4a681c5f595bdad19cfbd7b1d
[3] https://elinux.org/Buildroot:DeveloperDaysELCE2024#Rules_for_defconfigs

Cc: Michel Stempin <michel.stempin@wanadoo.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>

.checkpackageignore

@@ -178,7 +178,6 @@ configs/s6lx9_microboard_defconfig lib_defconfig.ForceCheckHash
 configs/sipeed_lichee_rv_defconfig lib_defconfig.ForceCheckHash
 configs/sipeed_lichee_rv_dock_defconfig lib_defconfig.ForceCheckHash
 configs/sipeed_licheepi_nano_defconfig lib_defconfig.ForceCheckHash
-configs/sipeed_licheepi_zero_defconfig lib_defconfig.ForceCheckHash
 configs/sipeed_maix_bit_defconfig lib_defconfig.ForceCheckHash
 configs/sipeed_maix_bit_sdcard_defconfig lib_defconfig.ForceCheckHash
 configs/sipeed_maix_dock_defconfig lib_defconfig.ForceCheckHash

board/sipeed/licheepi_zero/patches/linux/linux.hash

@@ -0,0 +1,2 @@
+# From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
+sha256  0fcbbbbcd456e87bbbfc8bf37af541fda62ccfcce76903503424fd101ef7bdee  linux-6.12.43.tar.xz

board/sipeed/licheepi_zero/patches/uboot/uboot.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256  0f933f6c5a426895bf306e93e6ac53c60870e4b54cda56d95211bec99e63bec7  u-boot-2025.07.tar.bz2

configs/sipeed_licheepi_zero_defconfig

@@ -1,7 +1,11 @@
 BR2_arm=y
 BR2_cortex_a7=y
 BR2_ARM_FPU_VFPV4=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_3=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV7_EABIHF_GLIBC_STABLE=y
+BR2_GLOBAL_PATCH_DIR="board/sipeed/licheepi_zero/patches"
+BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
 BR2_TARGET_GENERIC_HOSTNAME="licheepi-zero"
 BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for the LicheePi Zero"
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
@@ -10,10 +14,10 @@ BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/sipeed/licheepi_zero/genimage.cfg"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.3.5"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.43"
 BR2_LINUX_KERNEL_DEFCONFIG="sunxi"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="sun8i-v3s-licheepi-zero sun8i-v3s-licheepi-zero-dock"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="allwinner/sun8i-v3s-licheepi-zero allwinner/sun8i-v3s-licheepi-zero-dock"
 BR2_PACKAGE_LINUX_FIRMWARE=y
 BR2_PACKAGE_LINUX_FIRMWARE_RTL_87XX=y
 BR2_PACKAGE_WPA_SUPPLICANT=y
@@ -23,11 +27,12 @@ BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2022.01"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2025.07"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="LicheePi_Zero"
 BR2_TARGET_UBOOT_NEEDS_DTC=y
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
 BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
+BR2_TARGET_UBOOT_NEEDS_GNUTLS=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-sunxi-with-spl.bin"
 BR2_PACKAGE_HOST_DOSFSTOOLS=y