scsi: mac53c94: Fix a set-but-not-used compiler warning

scsi: mac53c94: Fix a set-but-not-used compiler warning

Fix the following compiler warning:

   drivers/scsi/mac53c94.c: In function 'mac53c94_init':
   drivers/scsi/mac53c94.c:128:13: warning: variable 'x' set but not used [-Wunused-but-set-variable]
     128 |         int x;

Link: https://lore.kernel.org/r/20220218195117.25689-31-bvanassche@acm.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>