rockchip: Enable preconsole for rk3328

Enable and set the start address of pre-console buffer for RK3328.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index f68a0a4..4f22d9b 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -180,6 +180,7 @@
 	select SUPPORT_TPL
 	select TPL
 	select TPL_NEEDS_SEPARATE_STACK if TPL
+	imply PRE_CONSOLE_BUFFER
 	imply ROCKCHIP_COMMON_BOARD
 	imply ROCKCHIP_SDRAM_COMMON
 	imply SPL_ROCKCHIP_COMMON_BOARD