msm: ipa3: IPA clock vote ioctl

The ability to vote IPA clock from user space is now required. Given
this, voting for IPA clock can now be done via an ioctl. This header
file supports the ioctl and can be independently propagated.

Change-Id: I742a7950f9fc53f17cb6f210f2b7f06ade842011
CRs-Fixed: 2592003
Signed-off-by: Perry Randise <prandise@codeaurora.org>