staging: rtl8723bs: core: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break statements instead of just
letting the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/cd07e3ebc11b44a3fe016341438e24cf950994a3.1605896059.git.gustavoars@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/core/rtw_cmd.c

@@ -1480,6 +1480,7 @@ void lps_ctrl_wk_hdl(struct adapter *padapter, u8 lps_ctrl_type)
 		break;
 	case LPS_CTRL_TRAFFIC_BUSY:
 		LPS_Leave(padapter, "LPS_CTRL_TRAFFIC_BUSY");
+		break;
 	default:
 		break;
 	}

drivers/staging/rtl8723bs/core/rtw_mlme_ext.c

@@ -1707,6 +1707,7 @@ unsigned int OnAssocRsp(struct adapter *padapter, union recv_frame *precv_frame)
 
 		case _ERPINFO_IE_:
 			ERP_IE_handler(padapter, pIE);
+			break;
 
 		default:
 			break;

drivers/staging/rtl8723bs/core/rtw_wlan_util.c

@@ -1514,6 +1514,7 @@ unsigned int is_ap_in_tkip(struct adapter *padapter)
 			case _RSN_IE_2_:
 				if (!memcmp((pIE->data + 8), RSN_TKIP_CIPHER, 4))
 					return true;
+				break;
 
 			default:
 				break;