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/clearfog_defconfig b/configs/clearfog_defconfig
index 730a702..0891b91 100644
--- a/configs/clearfog_defconfig
+++ b/configs/clearfog_defconfig
@@ -35,6 +35,7 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_SPL_OF_TRANSLATE=y
 CONFIG_SPI_FLASH=y
+CONFIG_PCI=y
 CONFIG_DEBUG_UART=y
 CONFIG_DEBUG_UART_BASE=0xd0012000
 CONFIG_DEBUG_UART_CLOCK=250000000