ahci: set udma mode to 5 to fix some 1.5Gbps drives

Some SATA 1.5G drives don't work with UDMA mode 6, so use mode 5 instead.
As this is SATA, the UDMA mode doesn't really matter.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
1 file changed