rockchip: rk3368: Migrate to use common board file

Use common board file for board_init() and board_late_init(),
for Rockchip SoCs have very similar process.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index 2b8bb8a..90916a3 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -131,6 +131,7 @@
 	select SUPPORT_TPL
 	select TPL_NEEDS_SEPARATE_TEXT_BASE if SPL
 	select TPL_NEEDS_SEPARATE_STACK if TPL
+	imply ROCKCHIP_COMMON_BOARD
 	imply SPL_ROCKCHIP_COMMON_BOARD
 	imply SPL_SEPARATE_BSS
 	imply SPL_SERIAL_SUPPORT