ASoC: bg: avoid delay while passing init params

Schedule cal init workqueue to open bg codec
channel and pass BG init params. This helps to
avoid delay during resume and recovery from BG SSR.

Change-Id: Ib68f2e21b2a5727b71046c936c938c0017e9bf2b
Signed-off-by: Bala Kishore Pati <balakishorepati@codeaurora.org>