[SCSI] aha152x: fix debug mode symbol conflict

The symbol <debug_locks> conflicts with the rather global one in
include/linux/locks.h.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>