Skinny: use proper name for station capabilities message

src/mod/endpoints/mod_skinny/skinny_protocol.h

@@ -131,7 +131,7 @@ struct PACKED line_stat_req_message {
 #define CAPABILITIES_RES_MESSAGE 0x0010
 struct PACKED station_capabilities {
     uint32_t codec;
-    uint16_t frames;
+    uint16_t max_frames_per_packet;
     char reserved[10];
 };