ARM: dts: DRA7: fix unit address of second PCIe instance

The unit address of the second PCIe instance
is set to be same as that of the first instance
(copy-paste error).

Fix it.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7.dtsi

@@ -324,7 +324,7 @@ axi@1 {
 			ranges = <0x51800000 0x51800000 0x3000
 				  0x0	     0x30000000 0x10000000>;
 			status = "disabled";
-			pcie@51000000 {
+			pcie@51800000 {
 				compatible = "ti,dra7-pcie";
 				reg = <0x51800000 0x2000>, <0x51802000 0x14c>, <0x1000 0x2000>;
 				reg-names = "rc_dbics", "ti_conf", "config";