WWAN chip support 3 interfaces as pci express, USB 2.0 and USB 3.0, the
usgae of Sarien choose to only use USB interface but not over pci
express, so totally disable pci express root port 12.
BUG=b:1246720
TEST=Boot up into OS with WWAN attached, cold boot and warm boot 10
cyles can still device can be listed under lsusb.
Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Change-Id: Ic4da393c0c0d903848111e1c037c2730c86afa7d
Reviewed-on: https://review.coreboot.org/c/30350
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
bb3d01a249