Add .arch_ops field in the sof_imx8x_ops structure.
The inclusion of this field will allow the usage of functions from
sof/core.c in order to print debug information such as the registers and
a stack dump in case of a firmware ops.

The SND_SOC_SOF_XTENSA is added in the imx/Kconfig file so the compilation
is successful.
Signed-off-by: Iulian Olaru <iulianolaru249@yahoo.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20200825235040.1586478-8-ranjani.sridharan@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>