ARM: ux500: Specify which IOS regulator to use for MMCI

In an effort to move platform specific GPIO controlled regulators
out from platform code we've created a new mechanism to specify
them from within the MMCI driver using the supply name 'vmmc-ios'.
For that to happen when booting device tree, we need to supply it
in the MMCI (SDI) node.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/href.dtsi

@@ -87,6 +87,7 @@
 			mmc-cap-sd-highspeed;
 			mmc-cap-mmc-highspeed;
 			vmmc-supply = <&ab8500_ldo_aux3_reg>;
+			vqmmc-supply = <&vmmci>;
 
 			cd-gpios  = <&tc3589x_gpio 3 0x4>;