Torpedo mainboard changes to fix warnings.

Torpedo mainboard changes to fix warnings.

Fixes the warnings generated in the torpedo mainboard build.  Most of these
changes are similar to fixes already implemented in the persimmon mainboard.

Change-Id: Ib931be51c0e6448c00c8cfeb13073e1f392582a5
Signed-off-by: Martin L Roth <martin@se-eng.com>
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: http://review.coreboot.org/634
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>