ice: Introduce ice_init_mac_fltr and move ice_napi_del

Consolidate adding unicast and broadcast MAC filters in a single new
function ice_init_mac_fltr.

Move ice_napi_del to ice_lib.c

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>