board: amlogic: move khadas-vim2 as q200 ref board

The Khadas vim2 derive from amlogic s912 reference design (Q200).

This patch moves the khadas-vim2 board support to a generic Q200 board,
while keeping a dedicated defconfig to customize the names and device tree.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/arch/arm/mach-meson/Kconfig b/arch/arm/mach-meson/Kconfig
index e0b28124..98303db 100644
--- a/arch/arm/mach-meson/Kconfig
+++ b/arch/arm/mach-meson/Kconfig
@@ -50,13 +50,14 @@
 	  You should also select this TARGET if you have Khadas Vim or
 	  a libretech aml-s905x-cc
 
-config TARGET_KHADAS_VIM2
+config TARGET_Q200
 	bool "KHADAS-VIM2"
 	select MESON_GXM
 	help
-	  Khadas VIM2 is a single board computer based on Meson GXM
+	  Q200 is a reference dessign board based on Meson GXM
 	  with 2/3 GiB of RAM, Ethernet, HDMI, 4 USB, micro-SD slot,
-	  eMMC, IR receiver and a 40-pin GPIO header.
+	  eMMC, IR receiver.
+	  You should also select this TARGET if you have Khadas Vim2.
 
 endchoice
 
@@ -72,6 +73,6 @@
 
 source "board/amlogic/p212/Kconfig"
 
-source "board/amlogic/khadas-vim2/Kconfig"
+source "board/amlogic/q200/Kconfig"
 
 endif