ASoC: SOF: Intel: hda: Remove boot_firmware skl and iccmax_icl declarations

hda_dsp_cl_boot_firmware_iccmax_icl and hda_dsp_cl_boot_firmware_skl is
no longer backed with an implementation, remove them from the hda.h

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20210915071805.5704-3-peter.ujfalusi@linux.intel.com


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