ASoC: SOF: Rename sof_arch_ops to dsp_arch_ops

ASoC: SOF: Rename sof_arch_ops to dsp_arch_ops

From the name sof_arch_ops one can not decipher that these ops are DSP
architecture ops.
Rename it to dsp_arch_ops and change also the macro to retrieve the DSP
architecture specific ops as well.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210916130308.7969-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>