AMD IOMMU: fix typo in comment

Impact: cleanup

Signed-off-by: Joerg Roedel <[e-mail]>

arch/x86/kernel/amd_iommu.c

···
 
 /*
  * This function contains common code for mapping of a physically
- * contiguous memory region into DMA address space. It is uses by all
- * mapping functions provided by this IOMMU driver.
+ * contiguous memory region into DMA address space. It is used by all
+ * mapping functions provided with this IOMMU driver.
  * Must be called with the domain lock held.
  */
 static dma_addr_t __map_single(struct device *dev,