Staging: phison: fix problem caused by libata change

The libata core changed this function so it needed to call a different
one.

See https://bugzilla.kernel.org/show_bug.cgi?id=19872

 for details.

Reported-by: Heinz Wiesinger <HMWiesinger@gmx.at>
Tested-by: Heinz Wiesinger <HMWiesinger@gmx.at>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>