iommu/sun50i: Fix compile warnings

A few compile warnings show up when building this driver:

  CC      drivers/iommu/sun50i-iommu.o
drivers/iommu/sun50i-iommu.c: In function ‘sun50i_dte_get_page_table’:
drivers/iommu/sun50i-iommu.c:486:16: warning: unused variable ‘flags’ [-Wunused-variable]
  486 |  unsigned long flags;
      |                ^~~~~
drivers/iommu/sun50i-iommu.c: In function ‘sun50i_iommu_unmap’:
drivers/iommu/sun50i-iommu.c:559:23: warning: unused variable ‘iommu’ [-Wunused-variable]
  559 |  struct sun50i_iommu *iommu = sun50i_domain->iommu;
      |                       ^~~~~
drivers/iommu/sun50i-iommu.c: In function ‘sun50i_iommu_probe_device’:
drivers/iommu/sun50i-iommu.c:749:22: warning: unused variable ‘group’ [-Wunused-variable]
  749 |  struct iommu_group *group;
      |                      ^~~~~

Remove the unused variables.

Signed-off-by: Joerg Roedel <[email protected]>
Cc: Maxime Ripard <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: joergroedel

drivers/iommu/sun50i-iommu.c

@@ -483,7 +483,6 @@ static u32 *sun50i_dte_get_page_table(struct sun50i_iommu_domain *sun50i_domain,
 				      dma_addr_t iova, gfp_t gfp)
 {
 	struct sun50i_iommu *iommu = sun50i_domain->iommu;
-	unsigned long flags;
 	u32 *page_table;
 	u32 *dte_addr;
 	u32 old_dte;
@@ -556,7 +555,6 @@ static size_t sun50i_iommu_unmap(struct iommu_domain *domain, unsigned long iova
 				 size_t size, struct iommu_iotlb_gather *gather)
 {
 	struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain);
-	struct sun50i_iommu *iommu = sun50i_domain->iommu;
 	phys_addr_t pt_phys;
 	dma_addr_t pte_dma;
 	u32 *pte_addr;
@@ -746,7 +744,6 @@ static int sun50i_iommu_attach_device(struct iommu_domain *domain,
 static struct iommu_device *sun50i_iommu_probe_device(struct device *dev)
 {
 	struct sun50i_iommu *iommu;
-	struct iommu_group *group;
 
 	iommu = sun50i_iommu_from_dev(dev);
 	if (!iommu)