ts: replace hardcoded CLOCK_FREQ multiples by VLC_TICK_FROM_SEC()

Easier to read and more explicit.

modules/demux/mpeg/ts_hotfixes.h

@@ -19,7 +19,7 @@
 #ifndef VLC_TS_HOTFIXES_H
 #define VLC_TS_HOTFIXES_H
 
-#define MIN_PAT_INTERVAL CLOCK_FREQ // DVB is 500ms
+#define MIN_PAT_INTERVAL VLC_TICK_FROM_SEC(1) // DVB is 500ms
 
 void ProbePES( demux_t *p_demux, ts_pid_t *pid, const uint8_t *p_pesstart, size_t i_data, bool b_adaptfield );
 void MissingPATPMTFixup( demux_t *p_demux );