selftests: net: local_termination: require mausezahn

Since the blamed commit, we require mausezahn because send_raw() uses it.
Remove the "REQUIRE_MZ=no" line, which overwrites the default of requiring it.

Fixes: 23797950 ("selftests: net: local_termination: add PTP frames to the mix")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20241219155410.1856868-1-vladimir.oltean@nxp.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>