pinctrl: freescale: Break dependency on SOC_IMX8MQ for i.MX8MQ

The CONFIG_SOC_IMX8MQ will go away, so the dependency can be based on
ARCH_MXC && ARM64.
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Acked-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/freescale/Kconfig

@@ -124,7 +124,7 @@ config PINCTRL_IMX7ULP
 
 config PINCTRL_IMX8MQ
 	bool "IMX8MQ pinctrl driver"
-	depends on SOC_IMX8MQ
+	depends on ARCH_MXC && ARM64
 	select PINCTRL_IMX
 	help
 	  Say Y here to enable the imx8mq pinctrl driver