pinctrl: rockchip: Add common rockchip pinctrl driver

Use this driver to fit all Rockchip SOCs and to support
the desired pinctrl configuration via DTS.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 66d36b9..e2c2b15 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -6,10 +6,10 @@
 obj-$(CONFIG_PINCTRL_AT91)		+= pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_AT91PIO4)		+= pinctrl-at91-pio4.o
 obj-y					+= nxp/
+obj-$(CONFIG_$(SPL_)PINCTRL_ROCKCHIP)	+= rockchip/
 obj-$(CONFIG_ARCH_ASPEED) += aspeed/
 obj-$(CONFIG_ARCH_ATH79) += ath79/
 obj-$(CONFIG_ARCH_RMOBILE) += renesas/
-obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
 obj-$(CONFIG_PINCTRL_SANDBOX)	+= pinctrl-sandbox.o
 
 obj-$(CONFIG_PINCTRL_UNIPHIER)	+= uniphier/