x86: fix domain cleanup

x86: fix domain cleanup

Free d->arch.cpuids on both the creation error path and during
destruction.

Don't bypass iommu_domain_destroy().

Move psr_domain_init() up so that hvm_domain_initialise() again is the
last thing which can fail, and hence doesn't require undoing later on.

Move psr_domain_free() up on the creation error path, so that cleanup
once again gets done in reverse order of setup.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Release-acked-by: Wei Liu <wei.liu2@citrix.com>