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/TOP5200.h b/include/configs/TOP5200.h
index dea5ead..1affcfd 100644
--- a/include/configs/TOP5200.h
+++ b/include/configs/TOP5200.h
@@ -67,6 +67,7 @@
 #  define CONFIG_PCI		1
 #  define CONFIG_PCI_PNP		1
 #  define CONFIG_PCI_SCAN_SHOW	1
+#  define CONFIG_PCIAUTO_SKIP_HOST_BRIDGE	1
 
 #  define CONFIG_PCI_MEM_BUS	0x40000000
 #  define CONFIG_PCI_MEM_PHYS	CONFIG_PCI_MEM_BUS