As part of modification of reg_set_channel_params_for_freq API to reg_set_channel_params_for_pwrmode to make it compatible with new API need to modify the wlan_reg_get_usable_channel with extra argument of REG_CURRENT_PWR_MODE, to invoke reg_set_channel_params_for_pwrmode which is having extra parameter of type supported_6g_pwr_types. Change-Id: I4589bc604ae6bbe25f24c4d0261bcf96347589a8 CRs-Fixed: 3311839