rockchip: Kconfig: enable SPL support for rk3328

Enable SPL support and some related option in Kconfig.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
[cherry picked from https://github.com/rockchip-linux/u-boot/commit/430b01462bf3f24aaf7920ae2587a6943c39ab5d with minor modifications]
Signed-off-by: Matwey V. Kornilov <matwey.kornilov@gmail.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index c05e3c3..3e38344 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -109,6 +109,13 @@
 config ROCKCHIP_RK3328
 	bool "Support Rockchip RK3328"
 	select ARM64
+	select SUPPORT_SPL
+	select SPL
+	imply SPL_SERIAL_SUPPORT
+	imply SPL_SEPARATE_BSS
+	select ENABLE_ARM_SOC_BOOT0_HOOK
+	select DEBUG_UART_BOARD_INIT
+	select SYS_NS16550
 	help
 	  The Rockchip RK3328 is a ARM-based SoC with a quad-core Cortex-A53.
 	  including NEON and GPU, 1MB L2 cache, Mali-T7 graphics, two