package/linux-headers: drop 6.16.x option

The 6.16.x series is now EOL upstream, so drop the linux-headers
option and add legacy handling for it.

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>

Config.in.legacy

@@ -146,6 +146,13 @@ endif
 
 comment "Legacy options removed in 2025.11"
 
+config BR2_KERNEL_HEADERS_6_16
+	bool "kernel headers version 6.16.x are no longer supported"
+	select BR2_LEGACY
+	help
+	  Version 6.16.x of the Linux kernel headers are no longer
+	  maintained upstream and are now removed.
+
 config BR2_PACKAGE_MURATA_CYW_FW_CYW4339_1CK
 	bool "This firmware has been removed"
 	select BR2_LEGACY

linux/linux.hash

@@ -1,6 +1,5 @@
 # From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
 sha256  fdebcb065065f5c1b8dc68a6fb59cda50cdddbf9103d207c2196d55ea764f57f  linux-6.17.2.tar.xz
-sha256  7ca4debc5ca912ebb8a76944a5c118afd5d09e31ef43c494adb14273da29a26e  linux-6.16.12.tar.xz
 sha256  b4850cf670a032c70f38b713a27d62046c5f747caf028c5f50b18f98606a9eb1  linux-6.12.52.tar.xz
 sha256  04c470e130d659ef05217ac695422c28d817d19daa50643fe28b945e6ab646c7  linux-6.6.111.tar.xz
 sha256  c29387aeee085fbcbd91236224b9df805063bac43615e75cea2c6b29604a5c73  linux-6.1.155.tar.xz

package/linux-headers/Config.in.host

@@ -54,10 +54,6 @@ config BR2_KERNEL_HEADERS_6_12
 	bool "Linux 6.12.x kernel headers"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_12
 
-config BR2_KERNEL_HEADERS_6_16
-	bool "Linux 6.16.x kernel headers"
-	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_16
-
 config BR2_KERNEL_HEADERS_6_17
 	bool "Linux 6.17.x kernel headers"
 	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_17
@@ -468,7 +464,6 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "6.1.155"	if BR2_KERNEL_HEADERS_6_1
 	default "6.6.111"	if BR2_KERNEL_HEADERS_6_6
 	default "6.12.52"	if BR2_KERNEL_HEADERS_6_12
-	default "6.16.12"	if BR2_KERNEL_HEADERS_6_16
 	default "6.17.2"	if BR2_KERNEL_HEADERS_6_17
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION
 	default "custom"	if BR2_KERNEL_HEADERS_CUSTOM_TARBALL