ARM: dts: gta04: add gps support

The GTA04 has a w2sg0004 or w2sg0084 gps chip. Not detectable
which one is mounted so use the compatibility entry for w2sg0004
for all which will work for both.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3-gta04.dtsi

@@ -329,6 +329,12 @@ OMAP3_CORE1_IOPAD(0x210a, PIN_OUTPUT | MUX_MODE0)   /* dss_data23.dss_data23 */
 		>;
        };
 
+	gps_pins: pinmux_gps_pins {
+		pinctrl-single,pins = <
+			OMAP3_CORE1_IOPAD(0x2176, PIN_OUTPUT_PULLDOWN | MUX_MODE4) /* gpio145 */
+		>;
+	};
+
 	hdq_pins: hdq_pins {
 		pinctrl-single,pins = <
 			OMAP3_CORE1_IOPAD(0x21c6, PIN_INPUT_PULLUP | MUX_MODE0) /* i2c3_sda.hdq */
@@ -666,6 +672,14 @@ &uart1 {
 &uart2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart2_pins>;
+	gnss: gnss {
+		compatible = "wi2wi,w2sg0004";
+		pinctrl-names = "default";
+		pinctrl-0 = <&gps_pins>;
+		sirf,onoff-gpios = <&gpio5 17 GPIO_ACTIVE_HIGH>;
+		lna-supply = <&vsim>;
+		vcc-supply = <&ldo_3v3>;
+	};
 };
 
 &uart3 {