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

Use min() in order to make code cleaner.

Reported-by: Zeal Robot <[e-mail]>
Signed-off-by: Changcheng Deng <[e-mail]>
Signed-off-by: Damien Le Moal <[e-mail]>

drivers/ata/libata-scsi.c

···
 	 */
 
 	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;
 	}
 
···
 	 */
 
 	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;
 	}