ppc4xx: PCIe: Change 16GB inbound memory to 4GB

This patch fixes a problem recently seen on some 4xx platforms. For
example on Kilauea PCIe slot #0.

Signed-off-by: Stefan Roese <sr@denx.de>

cpu/ppc4xx/4xx_pcie.c

@@ -1028,10 +1028,10 @@ void ppc4xx_setup_pcie_rootpoint(struct pci_controller *hose, int port)
 #endif
 	}
 
-	/* Set up 16GB inbound memory window at 0 */
+	/* Set up 4GB inbound memory window at 0 */
 	out_le32(mbase + PCI_BASE_ADDRESS_0, 0);
 	out_le32(mbase + PCI_BASE_ADDRESS_1, 0);
-	out_le32(mbase + PECFG_BAR0HMPA, 0x7fffffc);
+	out_le32(mbase + PECFG_BAR0HMPA, 0x7ffffff);
 	out_le32(mbase + PECFG_BAR0LMPA, 0);
 
 	out_le32(mbase + PECFG_PIM01SAH, 0xffff0000);