ASoC: Intel: Skylake: Add helpers for SRC and converter modules

SRC and converter modules are required to do frequency and channel
conversion in DSP. Both take base module configuration and additional SRC
and converter parameters. The helpers here are added to calculate the values
for these modules

Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>