msm: vidc: Add clock/bus votes for eos/flush commands

If voting is not added for eos and flush command processing,
Firmware is processing only high priority session commands
which causes non real time session to wait for completion of
realtime session for its eos processing. So adding votes for eos
and flush commands.

Change-Id: I9de8c1d0dc79e93d991d34d2d687e2fa1910531b
Signed-off-by: Vasantha Balla <quic_vballa@quicinc.com>