drivers/pci/Kconfig: Add PCI

Add 'PCI' as a menu option and migrate all existing users.

Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
diff --git a/configs/gwventana_defconfig b/configs/gwventana_defconfig
index 67753ad..0819a22 100644
--- a/configs/gwventana_defconfig
+++ b/configs/gwventana_defconfig
@@ -47,6 +47,7 @@
 CONFIG_DM=y
 CONFIG_NETDEVICES=y
 CONFIG_E1000=y
+CONFIG_PCI=y
 CONFIG_DM_SERIAL=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y