qcacmn: set center freq segment0 for channel params in 2g HT20 mode

In the routine sap_ch_params_to_bonding_channels, the channels is set
invalid value 0 if center freq segment0 for channel params is 0.

ch_params->center_freq_seg0 should be set for 2g HT20 mode.

Change-Id: I063f1341da5a4934c97dec4bcda9367101de7cc5
CRs-Fixed: 2179368

umac/regulatory/core/src/reg_services.c

@@ -1257,8 +1257,10 @@ static void reg_set_2g_channel_params(struct wlan_objmgr_pdev *pdev,
 						HIGH_PRIMARY_CH;
 				ch_params->center_freq_seg0 =
 					(oper_ch + sec_ch_2g)/2;
-			} else
+			} else {
 				ch_params->sec_ch_offset = NO_SEC_CH;
+				ch_params->center_freq_seg0 = oper_ch;
+			}
 			break;
 		}