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/malta_defconfig b/configs/malta_defconfig
index e74f23d..f1c8118 100644
--- a/configs/malta_defconfig
+++ b/configs/malta_defconfig
@@ -12,4 +12,5 @@
 # CONFIG_CMD_NFS is not set
 CONFIG_CMD_PING=y
 CONFIG_OF_EMBED=y
+CONFIG_PCI=y
 CONFIG_SYS_NS16550=y