linux: bump latest version to 6.15

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

linux/Config.in

@@ -28,8 +28,8 @@ choice
 	prompt "Kernel version"
 
 config BR2_LINUX_KERNEL_LATEST_VERSION
-	bool "Latest version (6.14)"
-	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_14 if BR2_KERNEL_HEADERS_AS_KERNEL
+	bool "Latest version (6.15)"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_15 if BR2_KERNEL_HEADERS_AS_KERNEL
 	# mips always generates an ITB image
 	select BR2_PACKAGE_HOST_UBOOT_TOOLS if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
 	select BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SUPPORT if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
@@ -137,7 +137,7 @@ config BR2_LINUX_KERNEL_CUSTOM_REPO_GIT_SUBMODULES
 
 config BR2_LINUX_KERNEL_VERSION
 	string
-	default "6.14.11" if BR2_LINUX_KERNEL_LATEST_VERSION
+	default "6.15.2" if BR2_LINUX_KERNEL_LATEST_VERSION
 	default "5.10.162-cip24" if BR2_LINUX_KERNEL_LATEST_CIP_VERSION
 	default "5.10.162-cip24-rt10" if BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
 	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \