iommufd: Fix spelling errors in comments

requres -> requires
dramtically -> dramatically

Link: https://lore.kernel.org/r/31680D47D9533D91+20230904023236.GA12494@xgk8823
Signed-off-by: GuokaiXu <xuguokai@ucas.com.cn>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Author: xgkucas

tools/testing/selftests/iommu/iommufd.c

@@ -1729,7 +1729,7 @@ TEST_F(vfio_compat_mock_domain, map)
 	ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
 	ASSERT_EQ(BUFFER_SIZE, unmap_cmd.size);
 
-	/* UNMAP_FLAG_ALL requres 0 iova/size */
+	/* UNMAP_FLAG_ALL requires 0 iova/size */
 	ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
 	unmap_cmd.flags = VFIO_DMA_UNMAP_FLAG_ALL;
 	EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));

tools/testing/selftests/iommu/iommufd_fail_nth.c

@@ -105,7 +105,7 @@ static bool fail_nth_next(struct __test_metadata *_metadata,
 
 	/*
 	 * This is just an arbitrary limit based on the current kernel
-	 * situation. Changes in the kernel can dramtically change the number of
+	 * situation. Changes in the kernel can dramatically change the number of
 	 * required fault injection sites, so if this hits it doesn't
 	 * necessarily mean a test failure, just that the limit has to be made
 	 * bigger.