ARM: dts: mxs: modify mx23/mx28 dts files to use padconfig defines

Convert mx23/mx28 dts files to use the padconfig defintions from
mxs-pinfunc.h.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx23-stmp378x_devb.dts

@@ -42,9 +42,9 @@
 						MX23_PAD_PWM3__GPIO_1_29
 						MX23_PAD_PWM4__GPIO_1_30
 					>;
-					fsl,drive-strength = <0>;
-					fsl,voltage = <1>;
-					fsl,pull-up = <0>;
+					fsl,drive-strength = <MXS_DRIVE_4mA>;
+					fsl,voltage = <MXS_VOLTAGE_HIGH>;
+					fsl,pull-up = <MXS_PULL_DISABLE>;
 				};
 			};
 		};