dfs_disable_radar_and_flush_pulses() is defined under
HOST_DFS_SPOOF_TEST compiler macro and this macro is disabled for
a few config profiles. Hence when dfs_disable_radar_and_flush_pulses()
is invoked from dfs_process_radar_ind_on_home_chan() API, it causes
unknown symbol error.
Define dfs_disable_radar_and_flush_pulses() API outside
HOST_DFS_SPOOF_TEST macro as it is independent of spoof test feature.
CRs-Fixed: 3411429
Change-Id: I939c0154bc79c63b878c23447fc370a924c52049