Add a helper for emitting a number of DSB NOOPs commands.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230606191504.18099-9-ville.syrjala@linux.intel.comReviewed-by: Uma Shankar <uma.shankar@intel.com>