Merge pull request #11012 from anlancs/bgpd-mh-simplify-condition

zebra: simplify one check for evpn-mh

diff --cc bgpd/bgp_evpn.c
Simple merge

diff --cc bgpd/bgp_evpn_mh.c
Simple merge

diff --cc bgpd/bgp_evpn_mh.h
Simple merge

diff --cc zebra/zebra_evpn_mh.c
Simple merge