Move the NTP offset definitions to internal.h

Originally committed as revision 22542 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/utils.c

@@ -3108,9 +3108,6 @@ int64_t av_gettime(void)
     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
 }
 
-#define NTP_OFFSET 2208988800ULL
-#define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
-
 uint64_t ff_ntp_time(void)
 {
   return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;