ARM: dts: at91: move mmc pinctrl-names property to board dts

Having the pinctrl-names property in the dtsi leads to dtbs_check warnings
when the board dts doesn't define pinctrl-0. Instead, move the property to
the board dts actually using the mmc node.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20200831171129.3886857-5-alexandre.belloni@bootlin.com
diff --git a/arch/arm/boot/dts/animeo_ip.dts b/arch/arm/boot/dts/animeo_ip.dts
index c36d28c..6d7fc9c 100644
--- a/arch/arm/boot/dts/animeo_ip.dts
+++ b/arch/arm/boot/dts/animeo_ip.dts
@@ -81,6 +81,7 @@ mmc0: mmc@fffa8000 {
 				pinctrl-0 = <&pinctrl_mmc0_clk
 					     &pinctrl_mmc0_slot1_cmd_dat0
 					     &pinctrl_mmc0_slot1_dat1_3>;
+				pinctrl-names = "default";
 				status = "okay";
 
 				slot@1 {