display: Relocate wakeup to where subroutine must go through

display: Relocate wakeup to where subroutine must go through

Wakeup request via power_request_change_state_strict() has moved to
location where all request must go through so that redundant requests
could be removed. There are the two points:
 - lcd_on_procedure()
 - proc_condition_lock()
Those two are the essential point considering both autosleep and
echomem in that system must remain wakeup on that point.

Change-Id: Ie257403c8f04fd8aac63f588d120858b7d1006e9
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>