drivers: mfd: Add support for wcd9335 version 2.0

Add support for wcd9335 version 2.0 and update the
register defaults accordingly based on the version.

Change-Id: I33038c1643b83ecd593891688c0ddf4a556b92ee
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>