Introduce a new DFS domain MKKN that supports new w53 Japan RADAR
pattern only.
Initialize a new empty RADAR table dfs_mkkn_radars for MKKN DFS domain.
Map The 5G regdamain MKK17 to the new DFS domain MKKN to make sure that
the new w53 Radar pulses should be detected only by JP country or
MKK17 5G regdomain.
Change-Id: Ib0f6a7e98353c9930e90703ead2342b932e491e3
CRs-Fixed: 2575347