target: add panel OFF commands to the panel info structure

Pass the panel OFF commands to the panel information structure
for all the supported panels in the respective oem_panel.c files
for 8084, 8916/39, 8974, 8610, 8x26, 8994 and 8909 targets. This
is needed to send panel OFF commands if needed during display
shutdown in LK.

Change-Id: I33ac76ba23445369cb58dc8b8d2c02b0100e92c5
10 files changed