drm/i915/audio: update audio keepalive clock values

BSPEC has updated the cdclk audio keepalives AUD_TS_CDCLK_M value to 60
for all supported platforms and refclks.

BSPEC: 54034
BSPEC: 55409
BSPEC: 65243
Cc: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230316234654.3797572-1-clinton.a.taylor@intel.com

drivers/gpu/drm/i915/display/intel_audio.c

@@ -983,11 +983,7 @@ void intel_audio_cdclk_change_pre(struct drm_i915_private *i915)
 
 static void get_aud_ts_cdclk_m_n(int refclk, int cdclk, struct aud_ts_cdclk_m_n *aud_ts)
 {
-	if (refclk == 24000)
-		aud_ts->m = 12;
-	else
-		aud_ts->m = 15;
-
+	aud_ts->m = 60;
 	aud_ts->n = cdclk * aud_ts->m / 24000;
 }