armv8/ls2085a: Update LS2085a PCIe compatible

Compatible field "fsl,20851a-pcie" is not correct.
So update it to "fsl,ls2085a-pcie"

Signed-off-by: Minghuan Lian <Minghuan.Lian at freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

include/configs/ls2085a_common.h

@@ -186,7 +186,8 @@ unsigned long long get_qixis_addr(void);
 #define CONFIG_PCIE2		/* PCIE controler 2 */
 #define CONFIG_PCIE3		/* PCIE controler 3 */
 #define CONFIG_PCIE4		/* PCIE controler 4 */
-#define FSL_PCIE_COMPAT "fsl,20851a-pcie"
+#define CONFIG_PCIE_LAYERSCAPE	/* Use common FSL Layerscape PCIe code */
+#define FSL_PCIE_COMPAT "fsl,ls2085a-pcie"
 
 #define CONFIG_SYS_PCI_64BIT