dv: add dv target output mode [1/1]

dv: add dv target output mode [1/1]

PD#SWPL-16861

Problem:
HDR core get the wrong dv output state when vd1/vd switching.
It caused the HDR core setting incorret.

Solution:
Add the new interface to update the correct state.

Verify:
Verified on AC213

Change-Id: I3df18b967257ccfcb57c110b4dbc79100d290a80
Signed-off-by: Brian Zhu <brian.zhu@amlogic.com>
(cherry picked from commit 9d31efae4a55eadf0beb62c404adb427fdd7d4ea)