qcacld-3.0: Set BW should backward compatible

Host updates channel bandwidth to the max supported bandwidth
on disconnection.
 hdd_cm_disconnect_complete_post_user_update
 -> hdd_set_mac_chan_width
 --> hdd_update_channel_width
 ---> sme_set_he_bw_cap

It causes that it could not support low BW, setting BW should
backward compatible to resolve this issue.

Change-Id: I05be526d701052c0147b5aa3ac1effa8d38b246f
CRs-Fixed: 3541945

core/sme/src/common/sme_api.c

@@ -14755,18 +14755,6 @@ void sme_set_he_bw_cap(mac_handle_t mac_handle, uint8_t vdev_id,
 	mac_ctx->he_cap_5g.chan_width_6 = 0;
 
 	switch (chwidth) {
-	case eHT_CHANNEL_WIDTH_20MHZ:
-		break;
-	case eHT_CHANNEL_WIDTH_40MHZ:
-		mac_ctx->mlme_cfg->he_caps.dot11_he_cap.chan_width_0 = 1;
-		mac_ctx->mlme_cfg->he_caps.dot11_he_cap.chan_width_1 = 1;
-		mac_ctx->he_cap_2g.chan_width_0 = 1;
-		mac_ctx->he_cap_5g.chan_width_1 = 1;
-		break;
-	case eHT_CHANNEL_WIDTH_80MHZ:
-		mac_ctx->mlme_cfg->he_caps.dot11_he_cap.chan_width_1 = 1;
-		mac_ctx->he_cap_5g.chan_width_1 = 1;
-		break;
 	case eHT_CHANNEL_WIDTH_160MHZ:
 	case eHT_CHANNEL_WIDTH_320MHZ:
 		mac_ctx->mlme_cfg->he_caps.dot11_he_cap.chan_width_1 = 1;
@@ -14785,6 +14773,18 @@ void sme_set_he_bw_cap(mac_handle_t mac_handle, uint8_t vdev_id,
 		mac_ctx->he_cap_5g.tx_he_mcs_map_lt_80;
 		mac_ctx->he_cap_5g.chan_width_1 = 1;
 		mac_ctx->he_cap_5g.chan_width_2 = 1;
+		fallthrough;
+	case eHT_CHANNEL_WIDTH_80MHZ:
+		mac_ctx->mlme_cfg->he_caps.dot11_he_cap.chan_width_1 = 1;
+		mac_ctx->he_cap_5g.chan_width_1 = 1;
+		fallthrough;
+	case eHT_CHANNEL_WIDTH_40MHZ:
+		mac_ctx->mlme_cfg->he_caps.dot11_he_cap.chan_width_0 = 1;
+		mac_ctx->mlme_cfg->he_caps.dot11_he_cap.chan_width_1 = 1;
+		mac_ctx->he_cap_2g.chan_width_0 = 1;
+		mac_ctx->he_cap_5g.chan_width_1 = 1;
+		fallthrough;
+	case eHT_CHANNEL_WIDTH_20MHZ:
 		break;
 	default:
 		sme_debug("Config BW %d not handled", chwidth);