iommu/amd: Use page mode macros in fetch_pte()

Use the page mode macros instead of magic numbers in fetch_pte.

Cc: Robin Murphy <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Joerg Roedel <[email protected]>
Signed-off-by: Jerry Snitselaar <[email protected]>
Reviewed-by: Vasant Hegde <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

Author: snits

drivers/iommu/amd/io_pgtable.c

@@ -310,8 +310,8 @@ static u64 *fetch_pte(struct amd_io_pgtable *pgtable,
 			return NULL;
 
 		/* Large PTE */
-		if (PM_PTE_LEVEL(*pte) == 7 ||
-		    PM_PTE_LEVEL(*pte) == 0)
+		if (PM_PTE_LEVEL(*pte) == PAGE_MODE_7_LEVEL ||
+		    PM_PTE_LEVEL(*pte) == PAGE_MODE_NONE)
 			break;
 
 		/* No level skipping support yet */