ARM: dts: msm: Add new clock level for Venus for sdm845

Add SVS3 clock level for Venus so that video driver votes
for correct Venus clock based on current load.

CRs-Fixed: 2069458
Change-Id: I358e39e11b114f53d348000afdf810d92b33dfd3
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>