kmod: sof_remove: add snd_soc_intel_sof_board_helpers

Fix issue reported by CI

rmmod: ERROR: Module snd_soc_intel_hda_dsp_common is in use by:
snd_soc_intel_sof_board_helpers

There's clearly a dependency between the two modules, confirmed by the
MODULE_IMPORT_NS in the code.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Author: plbossart

tools/kmod/sof_remove.sh

@@ -168,6 +168,7 @@ remove_module snd_soc_sdw_rt711_rt1308_rt715
 remove_module snd_soc_sof_sdw
 remove_module snd_soc_sof_es8336
 remove_module snd_soc_ehl_rt5660
+remove_module snd_soc_intel_sof_board_helpers
 remove_module snd_soc_intel_hda_dsp_common
 remove_module snd_soc_intel_sof_maxim_common
 remove_module snd_soc_intel_sof_realtek_common