ASoC: Intel: use local values for ssp configuration

So right now SSP configuration is statically coded in the driver. While we
would like to keep this configuration intact for the users who are using
these defaults, we need to provide a way for users to program it.
So create a local value in driver structure which is populate with default
value for now

Signed-off-by: Praveen Diwakar <praveen.diwakar@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>