mlxsw: core: Move basic_trap_groups_set() call out of EMAD init code

The call inits the EMAD group, but other groups as well. Therefore, move
it out of EMAD init code and call it before.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>