scsi: qla4xxx: Simplify conditional

Fix the following coccicheck warning:

./drivers/scsi/qla4xxx/ql4_83xx.c:475:23-25: WARNING !A || A && B is
equivalent to !A || B

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Wan Jiabing <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/qla4xxx/ql4_83xx.c

···
 		} else if (device_map[i].device_type == ISCSI_CLASS) {
 			if (drv_active & (1 << device_map[i].func_num)) {
 				if (!iscsi_present ||
-				    (iscsi_present &&
-				     (iscsi_func_low > device_map[i].func_num)))
+				iscsi_func_low > device_map[i].func_num)
 					iscsi_func_low = device_map[i].func_num;
 
 				iscsi_present++;