Convert CONFIG_PCI_CONFIG_HOST_BRIDGE to Kconfig

This converts the following to Kconfig:
   CONFIG_PCI_CONFIG_HOST_BRIDGE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 0ef5c29..53d0ebd7 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -48,6 +48,10 @@
 	  region type. This helps to add support for SoC's like OcteonTX/TX2
 	  where every peripheral is on the PCI bus.
 
+config PCI_CONFIG_HOST_BRIDGE
+	bool "Configure PCI host bridges"
+	default y if X86
+
 config PCI_MAP_SYSTEM_MEMORY
 	bool "Map local system memory from a virtual base address"
 	depends on MIPS