ASoC: wcd9335: Enable standalone ldo_h

Add support for standalone enablement of ldo_h
in wcd9335 hardware. This is required to enable
certain audio TX use-cases.

CRs-fixed: 1083755
Change-Id: Iea068907241b42846d95d8e62e59409cdd29ca42
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>