finetune ADK_TARGET_NO_KERNEL menu

Config.in

@@ -75,7 +75,7 @@ source "target/linux/config/Config.in.compression"
 source "target/config/Config.in.cmdline"
 
 menu "Advanced Linux Kernel configuration"
-	visible if ADK_TARGET_OS_LINUX && ADK_TARGET_KERNEL_CUSTOMISING && !ADK_APPLIANCE_TOOLCHAIN && !ADK_TARGET_CHOOSE_ARCH && !ADK_TARGET_LINUX_KERNEL_USE_DEFCONFIG && !ADK_TARGET_LINUX_KERNEL_USE_CUSTOMCONFIG
+	visible if ADK_TARGET_OS_LINUX && ADK_TARGET_KERNEL_CUSTOMISING && !ADK_APPLIANCE_TOOLCHAIN && !ADK_TARGET_CHOOSE_ARCH && !ADK_TARGET_LINUX_KERNEL_USE_DEFCONFIG && !ADK_TARGET_LINUX_KERNEL_USE_CUSTOMCONFIG && !ADK_TARGET_NO_KERNEL
 source "target/linux/Config.in"
 endmenu
 endmenu

target/config/Config.in.cmdline

@@ -3,6 +3,7 @@
 
 config ADK_TARGET_CMDLINE
 	string "Kernel commandline"
+	depends on !ADK_TARGET_NO_KERNEL
 	default "fbcon=rotate:1" if ADK_TARGET_SYSTEM_SHARP_ZAURUS
 	default "geodewdt.nowayout=1" if ADK_TARGET_MODEL_PCENGINES_ALIX1C
 	default "kinetis_platform=k70-som" if ADK_TARGET_SYSTEM_KINETIS_K70

target/linux/config/Config.in.compression

@@ -72,7 +72,7 @@ config ADK_LINUX_KERNEL_INITRAMFS_SOURCE
 
 choice
 prompt "Kernel compression"
-depends on ADK_TARGET_OS_LINUX && !ADK_APPLIANCE_TOOLCHAIN && !ADK_TARGET_CHOOSE_ARCH
+depends on ADK_TARGET_OS_LINUX && !ADK_APPLIANCE_TOOLCHAIN && !ADK_TARGET_CHOOSE_ARCH && !ADK_TARGET_NO_KERNEL
 default ADK_LINUX_KERNEL_COMP_ZSTD if ADK_TARGET_ARCH_OR1K
 default ADK_LINUX_KERNEL_COMP_GZIP