pinctrl: imx21: Remove the driver

Since commit 4b563a06 ("ARM: imx: Remove imx21 support") the imx21
SoC is no longer supported.

Get rid of its pinctrl driver too, which is now unused.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Link: https://lore.kernel.org/r/20201110190210.29376-1-festevam@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/freescale/Kconfig

@@ -24,13 +24,6 @@ config PINCTRL_IMX1
 	help
 	  Say Y here to enable the imx1 pinctrl driver
 
-config PINCTRL_IMX21
-	bool "i.MX21 pinctrl driver"
-	depends on SOC_IMX21
-	select PINCTRL_IMX1_CORE
-	help
-	  Say Y here to enable the i.MX21 pinctrl driver
-
 config PINCTRL_IMX27
 	bool "IMX27 pinctrl driver"
 	depends on SOC_IMX27

drivers/pinctrl/freescale/Makefile

@@ -4,7 +4,6 @@ obj-$(CONFIG_PINCTRL_IMX)	+= pinctrl-imx.o
 obj-$(CONFIG_PINCTRL_IMX_SCU)	+= pinctrl-scu.o
 obj-$(CONFIG_PINCTRL_IMX1_CORE)	+= pinctrl-imx1-core.o
 obj-$(CONFIG_PINCTRL_IMX1)	+= pinctrl-imx1.o
-obj-$(CONFIG_PINCTRL_IMX21)	+= pinctrl-imx21.o
 obj-$(CONFIG_PINCTRL_IMX27)	+= pinctrl-imx27.o
 obj-$(CONFIG_PINCTRL_IMX35)	+= pinctrl-imx35.o
 obj-$(CONFIG_PINCTRL_IMX50)	+= pinctrl-imx50.o