qcacld-3.0: Channel switch on 2G when CC is updated

Current logic in wlansap_get_chan_band_restrict will skip channel
switch for 2G channel which is disabled due to CC update by mistake.
Update the condiction logic to make it work properly.

Change-Id: Ib4c07447f14a47c2934c63ebdc09821eb8e5a3d1
CRs-Fixed: 2818651

core/sap/src/sap_module.c

@@ -3069,9 +3069,8 @@ qdf_freq_t wlansap_get_chan_band_restrict(struct sap_context *sap_ctx,
 			sap_debug("set 40M when switch SAP to 2G");
 			restart_ch_width = CH_WIDTH_40MHZ;
 		}
-	} else if (sap_band == REG_BAND_2G && (band & BIT(REG_BAND_5G))) {
-		if (sap_ctx->chan_freq_before_switch_band == 0)
-			return 0;
+	} else if (sap_band == REG_BAND_2G && (band & BIT(REG_BAND_5G)) &&
+		   sap_ctx->chan_freq_before_switch_band) {
 		restart_freq = sap_ctx->chan_freq_before_switch_band;
 		restart_ch_width = sap_ctx->chan_width_before_switch_band;
 		sap_debug("Restore chan freq: %d, width: %d",