ASoC: Intel: modularize driver probe and remove

The driver probe which initializes driver and remove which cleans up can be
shared with APCI as well, so move them to common init_context and
cleanup_context routines which can be used by ACPI as well

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>