configs/cubieboard2: bump Linux to 6.12.42 and U-Boot to 2025.07

Signed-off-by: Scott Fan <fancp2007@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

board/cubietech/cubieboard2/patches/linux/linux.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256  643142c1b5991560dd12f950825cc19e4497b95b82641918ecff1177f4130c1d  linux-6.12.24.tar.xz
+sha256  4804528a29cd20309a0b41c30e5aeffc35fa21ee3358f4a706d4586d003bc1fb  linux-6.12.42.tar.xz

board/cubietech/cubieboard2/patches/uboot/uboot.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256  439d3bef296effd54130be6a731c5b118be7fddd7fcc663ccbc5fb18294d8718  u-boot-2025.04.tar.bz2
+sha256  0f933f6c5a426895bf306e93e6ac53c60870e4b54cda56d95211bec99e63bec7  u-boot-2025.07.tar.bz2

configs/cubieboard2_defconfig

@@ -9,7 +9,7 @@ BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/cubietech/cubieboard2/genimage.cfg"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.24"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.42"
 BR2_LINUX_KERNEL_DEFCONFIG="multi_v7"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="allwinner/sun7i-a20-cubieboard2"
@@ -19,7 +19,7 @@ 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="2025.04"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2025.07"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="Cubieboard2"
 BR2_TARGET_UBOOT_NEEDS_DTC=y
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y