If populate_msi_sysfs() function failed msix_capability_init() must return
the error code, but it returns the success instead.  This update fixes the
described misbehaviour.
Signed-off-by: NAlexander Gordeev <agordeev@redhat.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NTejun Heo <tj@kernel.org>