STAGING is needed for Lemote framebuffer driver

target/linux/config/Config.in.graphics

@@ -108,6 +108,7 @@ config ADK_KERNEL_FB_SM7XX
 	select ADK_KERNEL_FB
 	select ADK_KERNEL_FRAMEBUFFER_CONSOLE
 	select ADK_KERNEL_FONT_8x16
+	select ADK_KERNEL_STAGING
 	default y if ADK_TARGET_SYSTEM_LEMOTE_YEELONG
  	default n
 	depends on ADK_TARGET_SYSTEM_LEMOTE_YEELONG

target/linux/config/Config.in.kernel

@@ -1,3 +1,6 @@
+config ADK_KERNEL_STAGING
+	boolean
+
 config ADK_KERNEL_EXPERIMENTAL
 	boolean