scsi: ufs: host: mediatek: Add debug information for Auto-Hibern8

Enhance the clock gating logic by adding debug information for the
Auto-Hibern8 (AHIT) register.  This additional logging aids in
troubleshooting by providing insights into the AHIT configuration when
the clock is not turned off as expected.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20250811131423.3444014-4-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: ptr324

drivers/ufs/host/ufs-mediatek.c

@@ -798,8 +798,14 @@ static int ufs_mtk_setup_clocks(struct ufs_hba *hba, bool on,
 				clk_pwr_off = true;
 		}
 
-		if (clk_pwr_off)
+		if (clk_pwr_off) {
 			ufs_mtk_pwr_ctrl(hba, false);
+		} else {
+			dev_warn(hba->dev, "Clock is not turned off, hba->ahit = 0x%x, AHIT = 0x%x\n",
+				hba->ahit,
+				ufshcd_readl(hba,
+					REG_AUTO_HIBERNATE_IDLE_TIMER));
+		}
 		ufs_mtk_mcq_disable_irq(hba);
 	} else if (on && status == POST_CHANGE) {
 		ufs_mtk_pwr_ctrl(hba, true);