omap4: serial: console: hold wakelock

Hold a timed wakelock so that on uart activity,
dont allow the sytem to go to suspend for 5 seconds.

Timed wakelock is held:
a) on wakeup from suspend
b) on any uart activity

Change-Id: I24607e873eaee424c55b71b1c20264a6f8bf8258
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
1 file changed