Juniper: Avoid testing ndo->ndo_eflag > 1

Juniper: Avoid testing ndo->ndo_eflag > 1

It's the only case where ndo->ndo_eflag is tested > 1.
It's not documented we could use -ee[...].

To print more details, we already have -v[v]... (if needed).
Using -e[e]... could add some confusion.
This also add more complexity on a test matrix:
('', '-v', '-e', '-ve', -'vee', -vve, '-vvee', etc.).

Thus replace this only case by ndo->ndo_eflag to only have to test
ndo_eflag == 0 or ndo_eflag == 1.