pcie/layerscape: fix bug in bus number computation when setting msi-map

When multiple PCI cards are present in an ls2080a board, the second
card does not get its msi-map set up properly due to a bug in
computing the bus number.

The bus number returned by PCI_BDF() is not the actual PCI bus
number, but instead represents a global u-boot PCI bus number. A
given bus number is relative to hose->first_busno, so that has to be
subtracted from the PCI device id.

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com>
Acked-by: Stuart Yoder <stuart.yoder@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

drivers/pci/pcie_layerscape.c

@@ -569,7 +569,7 @@ static void fdt_fixup_pcie(void *blob)
 	unsigned char header_type;
 	int index;
 	u32 streamid;
-	pci_dev_t dev;
+	pci_dev_t dev, bdf;
 	int bus;
 	unsigned short id;
 	struct pci_controller *hose;
@@ -611,12 +611,15 @@ static void fdt_fixup_pcie(void *blob)
 					continue;
 				}
 
+				/* the DT fixup must be relative to the hose first_busno */
+				bdf = dev - PCI_BDF(hose->first_busno, 0, 0);
+
 				/* map PCI b.d.f to streamID in LUT */
-				ls_pcie_lut_set_mapping(pcie, index, dev >> 8,
+				ls_pcie_lut_set_mapping(pcie, index, bdf >> 8,
 							streamid);
 
 				/* update msi-map in device tree */
-				fdt_pcie_set_msi_map_entry(blob, pcie, dev >> 8,
+				fdt_pcie_set_msi_map_entry(blob, pcie, bdf >> 8,
 							   streamid);
 			}
 		}