[SCSI] sgiwd93: export sgiwd93_reset()

mips allmodconfig:

ERROR: "sgiwd93_reset" [drivers/scsi/wd33c93.ko] undefined!

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>