iommu/sun50i: use page allocation function provided by iommu-pages.h

Convert iommu/sun50i-iommu.c to use the new page allocation functions
provided in iommu-pages.h.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Tested-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20240413002522.1101315-9-pasha.tatashin@soleen.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/sun50i-iommu.c

@@ -26,6 +26,8 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 
+#include "iommu-pages.h"
+
 #define IOMMU_RESET_REG			0x010
 #define IOMMU_RESET_RELEASE_ALL			0xffffffff
 #define IOMMU_ENABLE_REG		0x020
@@ -679,8 +681,7 @@ sun50i_iommu_domain_alloc_paging(struct device *dev)
 	if (!sun50i_domain)
 		return NULL;
 
-	sun50i_domain->dt = (u32 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
-						    get_order(DT_SIZE));
+	sun50i_domain->dt = iommu_alloc_pages(GFP_KERNEL, get_order(DT_SIZE));
 	if (!sun50i_domain->dt)
 		goto err_free_domain;
 
@@ -702,7 +703,7 @@ static void sun50i_iommu_domain_free(struct iommu_domain *domain)
 {
 	struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain);
 
-	free_pages((unsigned long)sun50i_domain->dt, get_order(DT_SIZE));
+	iommu_free_pages(sun50i_domain->dt, get_order(DT_SIZE));
 	sun50i_domain->dt = NULL;
 
 	kfree(sun50i_domain);