asoc: codecs: bolero: audio HM voting only supported on bengal

On bengal target, audio HM voting is only applicable.
Update bolero driver to make audio HM vote if audio core handle
is not present.

Change-Id: I9abaf42c04aa8f1b89d9c08e628ab142ce99151a
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>