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We have a bit of duplicated code around the DPLL disabling. Extract
that to a new function, and for symmetry also do the same for the
enable direction.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231012123522.26045-5-ville.syrjala@linux.intel.com

Reviewed-by: Jani Nikula <jani.nikula@intel.com>