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/boston64r2el_defconfig b/configs/boston64r2el_defconfig
index 9b5fa5a..b2f53dd 100644
--- a/configs/boston64r2el_defconfig
+++ b/configs/boston64r2el_defconfig
@@ -36,6 +36,7 @@
 CONFIG_CFI_FLASH=y
 CONFIG_DM_ETH=y
 CONFIG_PCH_GBE=y
+CONFIG_PCI=y
 CONFIG_DM_PCI=y
 CONFIG_PCI_XILINX=y
 CONFIG_SYS_NS16550=y