msm: vidc: Skip AON register programming for lagoon

AON register programming is used to set NOC to low
power mode during IRIS2 power off sequence. However
AON register memory map is not applicable and hence
skipping AON register programming for lagoon.

Change-Id: Ib63248d118ed9fecfa5fa87925e8f69625dc1ba8
Signed-off-by: Priyanka Gujjula <pgujjula@codeaurora.org>