board-glacier: restore hpin_irq for htc_headset_pmic

In attempt to clean up an error with pmic

Signed-off-by: Luis Cruz <ljc2491@gmail.com>
glacier-panel: fixups based on vivow display

 * added cabc autobl and better panel checking
 * further enhanced by elginsk8r

Change-Id: If6acb57329375a7dccefb639c3a6a36855aff613
Signed-off-by: Luis Cruz <ljc2491@gmail.com>