mainboard/ibase/mb899: Break out superio hwm conf from mainboard

Break out the PNP Super I/O HWM configuration from mainboard.c

Change-Id: Ib4c7f26c7fa2a9845250a61a23c75cb9e440ab93
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5797
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
4 files changed