Persimmon, Inagua: PCI devs 12.1, 13.1 (USB) don't exist, but 14.6 (GEC) does

USB ports 0-4 are handled by PCI devices 12.0 (OHCI) and 12.2 (EHCI). 12.1
simply does not exist, so remove it from devicetree.cb.  While at it make the
comment more detailed.  Likewise for all USB ports.

USB device 14.6 is the Broadcom GbE MAC integrated in the Hudson-E1.  Add it
to devicetree.cb.  It's used on Inagua (on), but not on Persimmon (off).

Change-Id: Idea27b3390fa4470f2592e79fdd633d5a218b97b
Signed-off-by: Jens Rottmann <JRottmann@LiPPERTembedded.de>
Reviewed-on: http://review.coreboot.org/2463
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
2 files changed