lantiq: ARV7519RW22: enable PCIe

Enable PCIe to make the (still unsupported) WAVE300 wireless visible to
the system.

Signed-off-by: Jorge Amorós <joramar76@yahoo.es>

target/linux/lantiq/dts/ARV7519RW22.dts

@@ -91,7 +91,8 @@
 		};
 
 		pcie@d900000 {
-			status = "disabled";
+			status = "okay";
+			gpio-reset = <&gpio 21 GPIO_ACTIVE_HIGH>;
 		};
 	};