pinctrl: imx: add imx8qm driver

MX8QM contains a system controller that is responsible for controlling
the pad setting of the IPs that are present. Communication between the
host processor running an OS and the system controller happens through
a SCU protocol. This patch adds the SCU based MX8QM pinctrl driver.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/freescale/Kconfig

@@ -129,6 +129,13 @@ config PINCTRL_IMX8MQ
 	help
 	  Say Y here to enable the imx8mq pinctrl driver
 
+config PINCTRL_IMX8QM
+	bool "IMX8QM pinctrl driver"
+	depends on ARCH_MXC && ARM64
+	select PINCTRL_IMX_SCU
+	help
+	  Say Y here to enable the imx8qm pinctrl driver
+
 config PINCTRL_IMX8QXP
 	bool "IMX8QXP pinctrl driver"
 	depends on ARCH_MXC && ARM64

drivers/pinctrl/freescale/Makefile

@@ -19,6 +19,7 @@ obj-$(CONFIG_PINCTRL_IMX6UL)	+= pinctrl-imx6ul.o
 obj-$(CONFIG_PINCTRL_IMX7D)	+= pinctrl-imx7d.o
 obj-$(CONFIG_PINCTRL_IMX7ULP)	+= pinctrl-imx7ulp.o
 obj-$(CONFIG_PINCTRL_IMX8MQ)	+= pinctrl-imx8mq.o
+obj-$(CONFIG_PINCTRL_IMX8QM)	+= pinctrl-imx8qm.o
 obj-$(CONFIG_PINCTRL_IMX8QXP)	+= pinctrl-imx8qxp.o
 obj-$(CONFIG_PINCTRL_VF610)	+= pinctrl-vf610.o
 obj-$(CONFIG_PINCTRL_MXS)	+= pinctrl-mxs.o