platform-drivers: msm: sps: migrate to new clock API

Upstream has changed the clock voting api from a single api that must
be atmoic context compatable, to a split api with atomic and non-atomic
components. Migrate to the new api as the old one is deprecated and
will be removed soon.

Change-Id: I5e2eaad78728a8fb9e10e18d8fd49bbec67cb40e
Signed-off-by: Yan He <yanhe@codeaurora.org>