ata: libata: use min() to make code cleaner

Use min() in order to make code cleaner.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

drivers/ata/libata-scsi.c

@@ -3591,10 +3591,7 @@ static int ata_mselect_caching(struct ata_queued_cmd *qc,
 	 */
 
 	if (len != CACHE_MPAGE_LEN - 2) {
-		if (len < CACHE_MPAGE_LEN - 2)
-			*fp = len;
-		else
-			*fp = CACHE_MPAGE_LEN - 2;
+		*fp = min(len, CACHE_MPAGE_LEN - 2);
 		return -EINVAL;
 	}
 
@@ -3647,10 +3644,7 @@ static int ata_mselect_control(struct ata_queued_cmd *qc,
 	 */
 
 	if (len != CONTROL_MPAGE_LEN - 2) {
-		if (len < CONTROL_MPAGE_LEN - 2)
-			*fp = len;
-		else
-			*fp = CONTROL_MPAGE_LEN - 2;
+		*fp = min(len, CONTROL_MPAGE_LEN - 2);
 		return -EINVAL;
 	}