powerpc/83xx: Add support for MCU microcontroller in .dts files

MCU is an external Freescale MC9S08QG8 microcontroller, mainly used to
provide soft power-off function, but also exports two GPIOs (wired to
the LEDs and also available from the external headers).

Added the MCU on mpc8349emitx, mpc837xrdb and mpc8315erdb boards.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/mpc8315erdb.dts

@@ -121,6 +121,14 @@
 				compatible = "dallas,ds1339";
 				reg = <0x68>;
 			};
+
+			mcu_pio: mcu@a {
+				#gpio-cells = <2>;
+				compatible = "fsl,mc9s08qg8-mpc8315erdb",
+					     "fsl,mcu-mpc8349emitx";
+				reg = <0x0a>;
+				gpio-controller;
+			};
 		};
 
 		spi@7000 {

arch/powerpc/boot/dts/mpc8349emitx.dts

@@ -131,6 +131,14 @@
 				interrupt-parent = <&ipic>;
 				interrupts = <71 8>;
 			};
+
+			mcu_pio: mcu@a {
+				#gpio-cells = <2>;
+				compatible = "fsl,mc9s08qg8-mpc8349emitx",
+					     "fsl,mcu-mpc8349emitx";
+				reg = <0x0a>;
+				gpio-controller;
+			};
 		};
 
 		usb@22000 {

arch/powerpc/boot/dts/mpc8377_rdb.dts

@@ -121,6 +121,14 @@
 				compatible = "dallas,ds1339";
 				reg = <0x68>;
 			};
+
+			mcu_pio: mcu@a {
+				#gpio-cells = <2>;
+				compatible = "fsl,mc9s08qg8-mpc8377erdb",
+					     "fsl,mcu-mpc8349emitx";
+				reg = <0x0a>;
+				gpio-controller;
+			};
 		};
 
 		i2c@3100 {

arch/powerpc/boot/dts/mpc8378_rdb.dts

@@ -121,6 +121,14 @@
 				compatible = "dallas,ds1339";
 				reg = <0x68>;
 			};
+
+			mcu_pio: mcu@a {
+				#gpio-cells = <2>;
+				compatible = "fsl,mc9s08qg8-mpc8378erdb",
+					     "fsl,mcu-mpc8349emitx";
+				reg = <0x0a>;
+				gpio-controller;
+			};
 		};
 
 		i2c@3100 {

arch/powerpc/boot/dts/mpc8379_rdb.dts

@@ -121,6 +121,14 @@
 				compatible = "dallas,ds1339";
 				reg = <0x68>;
 			};
+
+			mcu_pio: mcu@a {
+				#gpio-cells = <2>;
+				compatible = "fsl,mc9s08qg8-mpc8379erdb",
+					     "fsl,mcu-mpc8349emitx";
+				reg = <0x0a>;
+				gpio-controller;
+			};
 		};
 
 		i2c@3100 {