ARM: dt: tegra cardhu: add pinmux to device tree

This adds a minimal pinmux configuration to the Tegra Cardhu device
tree. Initially, just the built-in eMMC and SD card slot are configured.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net

arch/arm/boot/dts/tegra-cardhu.dts

@@ -10,6 +10,50 @@ memory {
 		reg = < 0x80000000 0x40000000 >;
 	};
 
+	pinmux@70000000 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&state_default>;
+
+		state_default: pinmux {
+			sdmmc1_clk_pz0 {
+				nvidia,pins = "sdmmc1_clk_pz0";
+				nvidia,function = "sdmmc1";
+				nvidia,pull = <0>;
+				nvidia,tristate = <0>;
+			};
+			sdmmc1_cmd_pz1 {
+				nvidia,pins =	"sdmmc1_cmd_pz1",
+						"sdmmc1_dat0_py7",
+						"sdmmc1_dat1_py6",
+						"sdmmc1_dat2_py5",
+						"sdmmc1_dat3_py4";
+				nvidia,function = "sdmmc1";
+				nvidia,pull = <2>;
+				nvidia,tristate = <0>;
+			};
+			sdmmc4_clk_pcc4 {
+				nvidia,pins =	"sdmmc4_clk_pcc4",
+						"sdmmc4_rst_n_pcc3";
+				nvidia,function = "sdmmc4";
+				nvidia,pull = <0>;
+				nvidia,tristate = <0>;
+			};
+			sdmmc4_dat0_paa0 {
+				nvidia,pins =	"sdmmc4_dat0_paa0",
+						"sdmmc4_dat1_paa1",
+						"sdmmc4_dat2_paa2",
+						"sdmmc4_dat3_paa3",
+						"sdmmc4_dat4_paa4",
+						"sdmmc4_dat5_paa5",
+						"sdmmc4_dat6_paa6",
+						"sdmmc4_dat7_paa7";
+				nvidia,function = "sdmmc4";
+				nvidia,pull = <2>;
+				nvidia,tristate = <0>;
+			};
+		};
+	};
+
 	serial@70006000 {
 		clock-frequency = < 408000000 >;
 	};