scsi: ufs: core: Use hba->reserved_slot

Use hba->reserved_slot instead of open-coding it. This patch prepares
for changing the value of hba->reserved_slot.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251031204029.2883185-21-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: bvanassche

drivers/ufs/core/ufs-mcq.c

@@ -544,7 +544,7 @@ int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag)
 	if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC)
 		return -ETIMEDOUT;
 
-	if (task_tag != hba->nutrs - UFSHCD_NUM_RESERVED) {
+	if (task_tag != hba->reserved_slot) {
 		if (!cmd)
 			return -EINVAL;
 		hwq = ufshcd_mcq_req_to_hwq(hba, scsi_cmd_to_rq(cmd));