ASoC: Intel: sof-rt5682: setup pll_id only when needed

The variable 'pll_id' is needed only when we use snd_soc_dai_set_pll()
to setup PLL. Move the code segment to improve some readability.

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20240426152529.38345-22-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>