ASoC: SOF: Fix DSP oops stack dump output contents

Fix @buf arg given to hex_dump_to_buffer() and stack address used
in dump error output.

Fixes: e657c18a

 ('ASoC: SOF: Add xtensa support')
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20210915063230.29711-1-peter.ujfalusi@linux.intel.com


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