staging/rdma/hfi1: Replacement of goto's for break/returns

It replaces goto's for break and return statements in process_perf_opa().

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>