mwifiex: mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/cfg80211.c

@@ -1158,6 +1158,7 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 		case NL80211_IFTYPE_UNSPECIFIED:
 			mwifiex_dbg(priv->adapter, INFO,
 				    "%s: kept type as IBSS\n", dev->name);
+			/* fall through */
 		case NL80211_IFTYPE_ADHOC:	/* This shouldn't happen */
 			return 0;
 		default:
@@ -1188,6 +1189,7 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 		case NL80211_IFTYPE_UNSPECIFIED:
 			mwifiex_dbg(priv->adapter, INFO,
 				    "%s: kept type as STA\n", dev->name);
+			/* fall through */
 		case NL80211_IFTYPE_STATION:	/* This shouldn't happen */
 			return 0;
 		default:
@@ -1210,6 +1212,7 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 		case NL80211_IFTYPE_UNSPECIFIED:
 			mwifiex_dbg(priv->adapter, INFO,
 				    "%s: kept type as AP\n", dev->name);
+			/* fall through */
 		case NL80211_IFTYPE_AP:		/* This shouldn't happen */
 			return 0;
 		default:
@@ -1249,6 +1252,7 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 		case NL80211_IFTYPE_UNSPECIFIED:
 			mwifiex_dbg(priv->adapter, INFO,
 				    "%s: kept type as P2P\n", dev->name);
+			/* fall through */
 		case NL80211_IFTYPE_P2P_CLIENT:
 		case NL80211_IFTYPE_P2P_GO:
 			return 0;

drivers/net/wireless/marvell/mwifiex/scan.c

@@ -1308,6 +1308,7 @@ int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
 
 		case WLAN_EID_CHANNEL_SWITCH:
 			bss_entry->chan_sw_ie_present = true;
+			/* fall through */
 		case WLAN_EID_PWR_CAPABILITY:
 		case WLAN_EID_TPC_REPORT:
 		case WLAN_EID_QUIET: