Frequency value of zero did not make sense, use same 24.576MHz
setting and only change the clock source in idle mode
Suggested-by: NBard Liao <bardliao@realtek.com>
Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>