iommu: Replace __iommu_group_dma_first_attach() with set_domain

iommu: Replace __iommu_group_dma_first_attach() with set_domain

Reorganize the attach_deferred logic to set dev->iommu->attach_deferred
immediately during probe and then have __iommu_device_set_domain() check
it and not attach the default_domain.

This is to prepare for removing the group->domain set from
iommu_group_alloc_default_domain() by calling __iommu_group_set_domain()
to set the group->domain.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/6-v5-1b99ae392328+44574-iommu_err_unwind_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>