vfio: selftests: Centralize IOMMU mode name definitions

Replace scattered string literals with MODE_* macros in iommu.h. This
provides a single source of truth for IOMMU mode name strings.

Signed-o

vfio: selftests: Centralize IOMMU mode name definitions

Replace scattered string literals with MODE_* macros in iommu.h. This
provides a single source of truth for IOMMU mode name strings.

Signed-off-by: Alex Mastro <amastro@fb.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Tested-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20260114-map-mmio-test-v3-1-44e036d95e64@fb.com
Signed-off-by: Alex Williamson <alex@shazbot.org>

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vfio: selftests: Drop <uapi/linux/types.h> includes

Drop the <uapi/linux/types.h> includes now that <linux/types.h>
(tools/include/linux/types.h) has a definition for __aligned_le64, which
is needed

vfio: selftests: Drop <uapi/linux/types.h> includes

Drop the <uapi/linux/types.h> includes now that <linux/types.h>
(tools/include/linux/types.h) has a definition for __aligned_le64, which
is needed by <linux/iommufd.h>.

Including <uapi/linux/types.h> is harmless but causes benign typedef
redefinitions. This is not a problem for VFIO selftests but becomes an
issue when the VFIO selftests library is built into KVM selftests, since
they are built with -std=gnu99 which does not allow typedef redifitions.

No functional change intended.

Signed-off-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20251219233818.1965306-3-dmatlack@google.com
Signed-off-by: Alex Williamson <alex@shazbot.org>

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