pinctrl: sh-pfc: r8a77965: Rename EtherAVB "mdc" pin group to "mdio"

On other Renesas SoCs, the pin group for the MDIO bus is named "mdio"
instead of "mdc".  Fix the inconsistency, while retaining backwards
compatibility with old DTBs using a pin group alias.

Fixes: fa3e8b71b955af86 ("pinctrl: sh-pfc: r8a77965: Add EtherAVB groups/functions")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a77965.c b/drivers/pinctrl/sh-pfc/pfc-r8a77965.c
index ce2e850..cea9d05 100644
--- a/drivers/pinctrl/sh-pfc/pfc-r8a77965.c
+++ b/drivers/pinctrl/sh-pfc/pfc-r8a77965.c
@@ -1597,11 +1597,11 @@
 static const unsigned int avb_phy_int_mux[] = {
 	AVB_PHY_INT_MARK,
 };
-static const unsigned int avb_mdc_pins[] = {
+static const unsigned int avb_mdio_pins[] = {
 	/* AVB_MDC, AVB_MDIO */
 	RCAR_GP_PIN(2, 9), PIN_NUMBER('A', 9),
 };
-static const unsigned int avb_mdc_mux[] = {
+static const unsigned int avb_mdio_mux[] = {
 	AVB_MDC_MARK, AVB_MDIO_MARK,
 };
 static const unsigned int avb_mii_pins[] = {
@@ -1951,7 +1951,8 @@
 	SH_PFC_PIN_GROUP(avb_link),
 	SH_PFC_PIN_GROUP(avb_magic),
 	SH_PFC_PIN_GROUP(avb_phy_int),
-	SH_PFC_PIN_GROUP(avb_mdc),
+	SH_PFC_PIN_GROUP_ALIAS(avb_mdc, avb_mdio),	/* Deprecated */
+	SH_PFC_PIN_GROUP(avb_mdio),
 	SH_PFC_PIN_GROUP(avb_mii),
 	SH_PFC_PIN_GROUP(avb_avtp_pps),
 	SH_PFC_PIN_GROUP(avb_avtp_match_a),
@@ -2002,7 +2003,8 @@
 	"avb_link",
 	"avb_magic",
 	"avb_phy_int",
-	"avb_mdc",
+	"avb_mdc",	/* Deprecated, please use "avb_mdio" instead */
+	"avb_mdio",
 	"avb_mii",
 	"avb_avtp_pps",
 	"avb_avtp_match_a",