arm64: tegra: Add Wifi node for Tegra210B01 P2894

The Tegra210B01 p2894 product has a BCM4356 module with wifi on pcie.
Enable the pcie port it is plugged into add a node for the wifi card,
and add a gpio-hog to enable power to the card. Attempts to tie the gpio
to power sequencing has not worked.

Change-Id: I7236fa1a3eabeb7fbb5b94af05f951b922955a38
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>

arch/arm64/boot/dts/nvidia/tegra210b01-p2894-2551-b00.dts

@@ -9,6 +9,28 @@
 	compatible = "nvidia,p2894-2551-b00", "nvidia,darcy", "nvidia,tegra210b01",
 		"nvidia,tegra210";
 
+	pcie@1003000 {
+		pci@1,0 {
+			phys = <&{/padctl@7009f000/pads/pcie/lanes/pcie-3}>,
+			       <&{/padctl@7009f000/pads/pcie/lanes/pcie-2}>;
+			phy-names = "pcie-0", "pcie-1";
+			status = "okay";
+
+			wifi@0,0 {
+				compatible = "brcm,bcm4356-fmac", "brcm,bcm4329-fmac";
+			};
+		};
+	};
+
+	gpio@6000d000 {
+		wlreg-hog {
+			gpio-hog;
+			gpios = <TEGRA_GPIO(H, 0) GPIO_ACTIVE_HIGH>;
+			output-high;
+			line-name = "wlreg_on";
+		};
+	};
+
 	pinmux@700008d4 {
 		pinmux {
 			pex_l0_rst_n_pa0 {