power: Simplify display_hint_sent
Check for whether the display hint has been sent at the start
of the set_interactive() function in the common powerHAL.
This gets rid of the need to replicate the same variable in
every target-specific powerHAL that implements the
set_interactive_override() function.
Also remove the unnecessary saved_interactive_mode variable
used by the msm-dcvs governor; its function is superseded by
the variable display_hint_sent.
Change-Id: If7dd11fcb578211f4f83847f9257232c4138ce53
12 files changed