commit 753a0850e707e9a8c5861356222f9b9e4eba7945 upstream

The multi-resource implementation anticipated discontiguous sub-division
support. That has not yet materialized, delete the infrastructure and
related code.
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NYang Shi <yang.shi@linux.alibaba.com>
Reviewed-by: NGavin Shan <shan.gavin@linux.alibaba.com>