rockchip: Add basic support for evb-rk3036 board

This add some basic files required to allow the board to dispaly
serial message and can run command(mmc info etc)

Signed-off-by: Lin Huang <hl@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Moved board Kconfig fragment from previous patch into this one to fix
build error:
Signed-off-by: Simon Glass <sjg@chromium.org>

Series-changes: 8
- moved board Kconfig fragment from previous patch into this one
diff --git a/configs/evb-rk3036_defconfig b/configs/evb-rk3036_defconfig
new file mode 100644
index 0000000..2e915ff
--- /dev/null
+++ b/configs/evb-rk3036_defconfig
@@ -0,0 +1,26 @@
+CONFIG_ARM=y
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_ROCKCHIP_RK3036=y
+CONFIG_TARGET_EVB_RK3036=y
+CONFIG_DEFAULT_DEVICE_TREE="rk3036-sdk"
+CONFIG_SPL_STACK_R=y
+CONFIG_SPL_STACK_R_ADDR=0x80000
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_PMIC=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_CLK=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
+CONFIG_RESET=y
+CONFIG_LED=y
+CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_PINCTRL=y
+CONFIG_ROCKCHIP_DWMMC=y
+CONFIG_ROCKCHIP_3036_PINCTRL=y
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_RAM=y
+CONFIG_DM_MMC=y
+CONFIG_USE_PRIVATE_LIBGCC=y
+CONFIG_CMD_DHRYSTONE=y
+CONFIG_ERRNO_STR=y