rockchip: add px30 architecture core

Add core architecture code to support the px30 soc.
This includes a separate tpl board file due to very limited
sram size as well as a non-dm sdram driver, as this also has
to fit into the tiny sram.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.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 7746b66..3cb934a 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -1,5 +1,27 @@
 if ARCH_ROCKCHIP
 
+config ROCKCHIP_PX30
+	bool "Support Rockchip PX30"
+	select ARM64
+	select SUPPORT_SPL
+	select SUPPORT_TPL
+	select SPL
+	select TPL
+	select TPL_TINY_FRAMEWORK if TPL
+	select TPL_NEEDS_SEPARATE_TEXT_BASE if SPL
+	select TPL_NEEDS_SEPARATE_STACK if TPL
+	imply SPL_SEPARATE_BSS
+	select SPL_SERIAL_SUPPORT
+	select TPL_SERIAL_SUPPORT
+	select DEBUG_UART_BOARD_INIT
+	imply ROCKCHIP_COMMON_BOARD
+	imply SPL_ROCKCHIP_COMMON_BOARD
+	help
+	  The Rockchip PX30 is a ARM-based SoC with a quad-core Cortex-A35
+	  including NEON and GPU, Mali-400 graphics, several DDR3 options
+	  and video codec support. Peripherals include Gigabit Ethernet,
+	  USB2 host and OTG, SDIO, I2S, UART, SPI, I2C and PWMs.
+
 config ROCKCHIP_RK3036
 	bool "Support Rockchip RK3036"
 	select CPU_V7A
@@ -317,6 +339,7 @@
 config SPL_MMC_SUPPORT
 	default y if !SPL_ROCKCHIP_BACK_TO_BROM
 
+source "arch/arm/mach-rockchip/px30/Kconfig"
 source "arch/arm/mach-rockchip/rk3036/Kconfig"
 source "arch/arm/mach-rockchip/rk3128/Kconfig"
 source "arch/arm/mach-rockchip/rk3188/Kconfig"