ARM: pxa: raumfeld-controller: fix 'dock detect' GPIO key

The dock detection input key is active low. Also add a pinmux for it.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>

arch/arm/boot/dts/pxa300-raumfeld-controller.dts

@@ -109,9 +109,10 @@ &pwm0 {
 };
 
 &keys {
+	pinctrl-0 = <&gpio_keys_pins &dock_detect_pins>;
 	dock-detect {
 		label = "dock detect";
-		gpios = <&gpio 116 GPIO_ACTIVE_HIGH>;
+		gpios = <&gpio 116 GPIO_ACTIVE_LOW>;
 		linux,code = <KEY_F5>;
 	};
 };
@@ -236,6 +237,14 @@ MFP_PIN_PXA300(105) MFP_AF0	/* PWM	*/
 		pinctrl-single,low-power-mode = MFP_LPM(MFP_LPM_FLOAT);
 	};
 
+	dock_detect_pins: dock_detect_pins {
+		pinctrl-single,pins = <
+			MFP_PIN_PXA300(116) MFP_AF0	/* DOCK_DETECT	*/
+		>;
+		pinctrl-single,low-power-mode = MFP_LPM(MFP_LPM_PULL_HIGH);
+		pinctrl-single,bias-pullup = MPF_PULL_UP;
+	};
+
 	lcdc_pins: lcdc-pins {
 		pinctrl-single,pins = <
 			MFP_PIN_PXA300(54) MFP_AF1	/* LDD_0	*/