msm: camera: cpas: Setting the vote level on max supported clock lvl basis

In Some targets number of use cases are 7 and it was an issue during
setting TURBO clock level.

Changed the validation from number of client usecase to MAX supported
clock level.

CRs-Fixed: 2571273
Change-Id: I05cd06ff11c2c43eb4b70d69314e04055894c5fc
Signed-off-by: Chandan Kumar Jha <cjha@codeaurora.org>