ASoC: wcd9306: Pull in changes from WCD9320

Cleanup wcd9306 codec driver, pull in fixes done for WCD9320 that
are also required for WCD9306.

Change-Id: Ib0bf6c7baa32877c03ebc7a138af087438b8694b
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
3 files changed