pinctrl: imx: Split imx_pinctrl_probe() into common and mmio parts

Split imx_pinctrl_probe() into imx_pinctrl_probe_common() and
imx_pinctrl_probe_mmio(). The former does the common setup, the
later does the common setup and MMIO access configuration. The
common setup can be used as-is for SCU based systems, update
the pinctrl-imx8 to call only the common setup, update all the
other pinctrl drivers to call imx_pinctrl_probe_mmio().

No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/pinctrl/nxp/pinctrl-imx8.c b/drivers/pinctrl/nxp/pinctrl-imx8.c
index 40976a9..a48e1b5 100644
--- a/drivers/pinctrl/nxp/pinctrl-imx8.c
+++ b/drivers/pinctrl/nxp/pinctrl-imx8.c
@@ -29,7 +29,7 @@
 	.name = "imx8_pinctrl",
 	.id = UCLASS_PINCTRL,
 	.of_match = of_match_ptr(imx8_pinctrl_match),
-	.probe = imx_pinctrl_probe,
+	.probe = imx_pinctrl_probe_common,
 	.priv_auto	= sizeof(struct imx_pinctrl_priv),
 	.ops = &imx8_pinctrl_ops,
 	.flags = DM_FLAG_PRE_RELOC,