lenovo/x220: Enable USB 3 controller

Since only X220 with i7 have the USB3 controller this was
probably overlooked.

Before this patch lspci on Linux would not show the NEC USB 3 controller
as well as the PCI bridge it is behind. After, both the bridge and the
NEC controller can be found in the output:

    05:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller
	(rev 04)

Change-Id: I5e7e3f0c7d023f6206a7bec42a39f8955a3d9331
Signed-off-by: Marian Tietz <mtcoreboot@gmail.com>
Reviewed-on: https://review.coreboot.org/12882
Tested-by: build bot (Jenkins)
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>

0 files changed, 0 insertions, 0 deletions