msm: 8974: mhl_sii8334: handle RAP CONTENT OFF

MHL-MSC driver handles RAP CONTENT OFF message by disabling TMDS
signals, this change send KEY_VENDOR event to handle this action.
This can achieve MSC RAP content-off functionality.

Change-Id: Ic197b73f6052dbc2087786c6cde4d4b5899b5fa4
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>
1 file changed