ASoC: wcd-dsp-mgr: add support to get ops from components

Add support in the wcd dsp manager driver to provide interface
to components to get operations from other components. This can
be used when components need to communicate amongst themselves
without intervention from manager driver.

Change-Id: Idddb60f0c8d6179046879bc358c840936c61299f
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>