ARM: tegra: add SD wp-gpios to Jetson TK1 DT

Jetson TK1 can detect write-protect on the SD card. Add the required
DT entries to allow this.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra124-jetson-tk1.dts

@@ -1624,6 +1624,7 @@ sdhci@0,700b0400 {
 		status = "okay";
 		cd-gpios = <&gpio TEGRA_GPIO(V, 2) GPIO_ACTIVE_LOW>;
 		power-gpios = <&gpio TEGRA_GPIO(R, 0) GPIO_ACTIVE_HIGH>;
+		wp-gpios = <&gpio TEGRA_GPIO(Q, 4) GPIO_ACTIVE_HIGH>;
 		bus-width = <4>;
 		vqmmc-supply = <&vddio_sdmmc3>;
 	};