These functions duplicated functionality which was ultimately added
to the pci core.

All users of these functions have been ported to using the newly
exposed pci functionality.  These functions are no longer used,
so drop them.
Acked-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NDave Airlie <airlied@redhat.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>