alix2: add support for alix6

The Alix6 is very similar to the alix2, differing in having 1 mini-PCIe
slot (USB 2.0 only), an RFKILL GPIO line going to that slot, and 1 or 2
SIM sockets.

Change-Id: I19e4e756966e60bb0310c19286654d3d579b8850
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Reviewed-on: http://review.coreboot.org/521
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2 files changed