arm: dts: Add new "generic" 66AK2Gx device tree file.

With U-boot runtime board detect for DTB selection a "default" dtb needs
to be created. This will be used temporarily until the "proper" dtb is
selected.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 9cc5c1e..867165f 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -372,7 +372,8 @@
 dtb-$(CONFIG_SOC_KEYSTONE) += keystone-k2hk-evm.dtb \
 	keystone-k2l-evm.dtb \
 	keystone-k2e-evm.dtb \
-	keystone-k2g-evm.dtb
+	keystone-k2g-evm.dtb \
+	keystone-k2g-generic.dtb
 
 dtb-$(CONFIG_TARGET_AT91SAM9263EK) += at91sam9263ek.dtb