Only allow running DMC wakelock code if the display version is 20 or
greater.  Also check if DMC is loaded before enabling.
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412094148.808179-3-luciano.coelho@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>