rockchip: rk3399: Enable TPL_BOARD_INIT

Enable TPL_BOARD_INIT, this would help us to show
TPL boot prints.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index 14e9d81..1624b08 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -191,6 +191,7 @@
 	imply TPL_LIBCOMMON_SUPPORT
 	imply TPL_LIBGENERIC_SUPPORT
 	imply TPL_SYS_MALLOC_SIMPLE
+	imply TPL_BOARD_INIT
 	imply TPL_BOOTROM_SUPPORT
 	imply TPL_DRIVERS_MISC_SUPPORT
 	imply TPL_OF_CONTROL