sis/sis966: Clean up sata.c

Wow, this one is disliked by clang for the empty for() loop, but
looking at the file just makes my eyes bleed a little bit. I remember
the circumstances under which we let this code go in. It was supposed
to save contributions from a vendor, but that never worked out.
Just to keep the little chunks down, here's an indent run and some of
the cruft removed that doesn't actually contribute to functionality in
any way.

Change-Id: Ie82166ca82f09c4b66decfde5ad194a2d70b0708
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/20386
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed