[PATCH v3 4/5] sata, highbank: set tx_atten override bits

Some board designs do not drive the SATA transmit lines within the specification. The ECME can provide override settings, on a per board basis, to bring the transmit lines within spec. Read those settings from the DTB and program them in. Signed-off-by: Mark Langsdorf --- Changes from v2

[PATCH v3 4/5] sata, highbank: set tx_atten override bits

Some board designs do not drive the SATA transmit lines within the specification. The ECME can provide override settings, on a per board basis, to bring the transmit lines within spec. Read those settings from the DTB and program them in. Signed-off-by: Mark Langsdorf mark.langsd...@calxeda.com