ARM: dts: am57xx-beagle-x15: Add "vqmmc-supply" property for mmc2

Add "vqmmc-supply" property for mmc2 to indicate the supply connected
to the IO lines.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi

@@ -442,6 +442,7 @@ &mmc2 {
 	pinctrl-0 = <&mmc2_pins_default>;
 
 	vmmc-supply = <&vdd_3v3>;
+	vqmmc-supply = <&vdd_3v3>;
 	bus-width = <8>;
 	ti,non-removable;
 	cap-mmc-dual-data-rate;