ARM: dts: ux500: Bump AUX1 voltage

The voltage default on the AB8500 VAUX1 regulator is way
too low and does not correspond to the setting in the
vendor tree. This should be 2.8-3.3 V not 2.5-2.9 V or
things like the HREFP520 touchscreen will not work.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/ste-ab8500.dtsi

@@ -317,8 +317,8 @@ ab8500-regulators {
 
 					// supplies to the display/camera
 					ab8500_ldo_aux1_reg: ab8500_ldo_aux1 {
-						regulator-min-microvolt = <2500000>;
-						regulator-max-microvolt = <2900000>;
+						regulator-min-microvolt = <2800000>;
+						regulator-max-microvolt = <3300000>;
 						regulator-boot-on;
 						/* BUG: If turned off MMC will be affected. */
 						regulator-always-on;