scsi: 3w-sas: Remove unneeded variable 'retval'

Fix the following coccicheck warning:

./drivers/scsi/3w-sas.c:866:5-11: Unneeded variable: "retval". Return "1"
on line 898

Link: https://lore.kernel.org/r/[e-mail]
Reported-by: Abaci Robot <[e-mail]>
Signed-off-by: Yang Li <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/3w-sas.c

···
 	TW_Command_Full *full_command_packet;
 	unsigned short error;
 	char *error_str;
-	int retval = 1;
 
 	header = tw_dev->sense_buffer_virt[i];
 	full_command_packet = tw_dev->command_packet_virt[request_id];
···
 		goto out;
 	}
 out:
-	return retval;
+	return 1;
 } /* End twl_fill_sense() */
 
 /* This function will free up device extension resources */