iommu/arm-smmu-v3: Revert vmaster in the error path

iommu/arm-smmu-v3: Revert vmaster in the error path

The error path for err_free_master_domain leaks the vmaster. Move all
the kfrees for vmaster into the goto error section.

Fixes: cfea71aea921 ("iommu/arm-smmu-v3: Put iopf enablement in the domain attach path")
Cc: stable@vger.kernel.org
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/20250711204020.1677884-1-nicolinc@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>