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/zc5202_defconfig b/configs/zc5202_defconfig
index 8d3f1df..c6f4bdc 100644
--- a/configs/zc5202_defconfig
+++ b/configs/zc5202_defconfig
@@ -30,4 +30,5 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_PCI=y
 CONFIG_OF_LIBFDT=y