ARM: dts: imx6qdl-sabresd: remove reg_sensors' regulator-always-on

Now that all sensors supplied by reg_sensors have supported
regulator control, reg_sensors does NOT need to be always ON,
remove "regulator-always-on" to save power.
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-sabresd.dtsi

@@ -64,7 +64,6 @@
 		regulator-max-microvolt = <3300000>;
 		gpio = <&gpio2 31 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
-		regulator-always-on;
 	};
 
 	gpio-keys {