Subject: [PATCH] Fix proximity sensor under low light.

From 3cc12fffe9027a1f5421bec9c8e551f760f1fb7b Mon Sep 17 00:00:00 2001
From: Thomas Wendt <thoemy@gmx.net>
Date: Sat, 9 Feb 2013 16:49:48 +0100

If the ambient light is too low the proximity sensor always reports "near"
which causes the screen to be immediately turned off when starting a call.
It is not possible to turn the screen on again until the other end hangs up.
Change the proximity sensor config to fix this.

Change-Id: I78194258d42d6599cdc039b3defa352a57d5f246