iommu/exynos: Make driver independent of the system page size

PAGE_{SIZE,SHIFT} macros depend on the configured kernel's page size, but
the driver expects values calculated as for 4KB pages. Fix this.

Reported-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220623093629.32178-1-m.szyprowski@samsung.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: mszyprow

drivers/iommu/exynos-iommu.c

@@ -340,8 +340,7 @@ static void __sysmmu_set_ptbase(struct sysmmu_drvdata *data, phys_addr_t pgd)
 	if (MMU_MAJ_VER(data->version) < 5)
 		writel(pgd, data->sfrbase + REG_PT_BASE_ADDR);
 	else
-		writel(pgd >> PAGE_SHIFT,
-			     data->sfrbase + REG_V5_PT_BASE_PFN);
+		writel(pgd / SZ_4K, data->sfrbase + REG_V5_PT_BASE_PFN);
 
 	__sysmmu_tlb_invalidate(data);
 }
@@ -551,7 +550,7 @@ static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data,
 		 * 64KB page can be one of 16 consecutive sets.
 		 */
 		if (MMU_MAJ_VER(data->version) == 2)
-			num_inv = min_t(unsigned int, size / PAGE_SIZE, 64);
+			num_inv = min_t(unsigned int, size / SZ_4K, 64);
 
 		if (sysmmu_block(data)) {
 			__sysmmu_tlb_invalidate_entry(data, iova, num_inv);