linux: bump _KERNEL_LATEST_VERSION to 6.0

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

linux/Config.in

@@ -28,8 +28,8 @@ choice
 	prompt "Kernel version"
 
 config BR2_LINUX_KERNEL_LATEST_VERSION
-	bool "Latest version (5.17)"
-	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_17 if BR2_KERNEL_HEADERS_AS_KERNEL
+	bool "Latest version (6.0)"
+	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_0 if BR2_KERNEL_HEADERS_AS_KERNEL
 
 config BR2_LINUX_KERNEL_LATEST_CIP_VERSION
 	bool "Latest CIP SLTS version (5.10.115-cip7)"
@@ -128,7 +128,7 @@ endif
 
 config BR2_LINUX_KERNEL_VERSION
 	string
-	default "5.17.15" if BR2_LINUX_KERNEL_LATEST_VERSION
+	default "6.0" if BR2_LINUX_KERNEL_LATEST_VERSION
 	default "5.10.115-cip7" if BR2_LINUX_KERNEL_LATEST_CIP_VERSION
 	default "5.10.109-cip5-rt4" if BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
 	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \