ARM: dts: DRA74x: Use PCIe compatible specific to dra74

Use dra74 specific compatible string for PCIe while preserving
the older compatible. While at that add a new label for the
2nd instance of pcie.

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>
diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index 24c104d..000ad9a 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -349,7 +349,7 @@
 			ranges = <0x51800000 0x51800000 0x3000
 				  0x0	     0x30000000 0x10000000>;
 			status = "disabled";
-			pcie@51800000 {
+			pcie2_rc: pcie@51800000 {
 				compatible = "ti,dra7-pcie";
 				reg = <0x51800000 0x2000>, <0x51802000 0x14c>, <0x1000 0x2000>;
 				reg-names = "rc_dbics", "ti_conf", "config";