ASoC: Intel: avs: Introduce helper functions for SSP and TDM handling

In quite a few places in code there are checks for number of SSPs
present on system, to reduce maintenance burden introduce helper
functions allowing to get SSP and TDM from machine board configuration.

Additionally in boards we use SSP and TDM to generate quite a few
strings, it could be done like:
if (tdms)
dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d:%d-Codec",
ssp_port, tdm_slot);
else
dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec",
ssp_port);

but quite quickly code ends up with spaghetti of similar if elses.
Instead introduce macro which can be used to generate correct string,
allowing to minimize code to something like:
dl->name = devm_kasprintf(dev, GFP_KERNEL, AVS_STRING_FMT("SSP", "-Codec",
ssp_port, tdm_slot));

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20231012083514.492626-3-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>