[POWERPC] 4xx: Set ibpre for 405EX in 4xx PCIe driver

This patch sets the ibpre flag (Inbound Presence) for the 405EX
in the 4xx PCIe driver.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index a656dc0..3c2c14c 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -844,6 +844,8 @@
 
 	dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000);  /* guarded on */
 
+	port->has_ibpre = 1;
+
 	return 0;
 }