rockchip: rk3308: Add support for ROC-RK3308-CC board

ROC-RK3308-CC is a rk3308 based board designed by
Firelfy, with eMMC and 256MB DDR3 and RTL8188 Wifi
on board.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/rk3308/Kconfig b/arch/arm/mach-rockchip/rk3308/Kconfig
index c74d1fc..b9fdfe2 100644
--- a/arch/arm/mach-rockchip/rk3308/Kconfig
+++ b/arch/arm/mach-rockchip/rk3308/Kconfig
@@ -4,6 +4,10 @@
 	bool "EVB_RK3308"
 	select BOARD_LATE_INIT
 
+config TARGET_ROC_RK3308_CC
+       bool "Firefly roc-rk3308-cc"
+	select BOARD_LATE_INIT
+
 config SYS_SOC
 	default "rk3308"
 
@@ -18,5 +22,6 @@
 
 
 source "board/rockchip/evb_rk3308/Kconfig"
+source "board/firefly/firefly-rk3308/Kconfig"
 
 endif