Update CONFIG_PCIAUTO_SKIP_HOST_BRIDGE to related boards

Remove test for CONFIG_MPC5200 in drivers/pci/pci_auto.c and define
CONFIG_PCIAUTO_SKIP_HOST_BRIDGE in related board configuration files.

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
diff --git a/include/configs/M5485EVB.h b/include/configs/M5485EVB.h
index 88dd219..9121023 100644
--- a/include/configs/M5485EVB.h
+++ b/include/configs/M5485EVB.h
@@ -129,6 +129,7 @@
 #ifdef CONFIG_CMD_PCI
 #define CONFIG_PCI		1
 #define CONFIG_PCI_PNP		1
+#define CONFIG_PCIAUTO_SKIP_HOST_BRIDGE	1
 
 #define CFG_PCI_MEM_BUS		0x80000000
 #define CFG_PCI_MEM_PHYS	CFG_PCI_MEM_BUS