MIPS:DTS:Correct device id of pcie for Loongnon-2K

from Loongson-2K user manual know that Loongson-2K have two
pcie controller pcie0 and pcie1, pcie0 have four port named port0~port3
and pcie1 have 2 port named port0~port1. the device id of port0 is 7a19
in each pcie controller and others are 7a09.

Signed-off-by: Xiaochuan Mao <[e-mail]>
Reviewed-by: Jiaxun Yang <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi

···
 			};
 
 			pci_bridge@a,0 {
-				compatible = "pci0014,7a19.0",
-						   "pci0014,7a19",
+				compatible = "pci0014,7a09.0",
+						   "pci0014,7a09",
 						   "pciclass060400",
 						   "pciclass0604";
 
···
 			};
 
 			pci_bridge@b,0 {
-				compatible = "pci0014,7a19.0",
-						   "pci0014,7a19",
+				compatible = "pci0014,7a09.0",
+						   "pci0014,7a09",
 						   "pciclass060400",
 						   "pciclass0604";
 
···
 			};
 
 			pci_bridge@c,0 {
-				compatible = "pci0014,7a19.0",
-						   "pci0014,7a19",
+				compatible = "pci0014,7a09.0",
+						   "pci0014,7a09",
 						   "pciclass060400",
 						   "pciclass0604";
 
···
 			};
 
 			pci_bridge@e,0 {
-				compatible = "pci0014,7a19.0",
-						   "pci0014,7a19",
+				compatible = "pci0014,7a09.0",
+						   "pci0014,7a09",
 						   "pciclass060400",
 						   "pciclass0604";