[2/2] Keyguard: Fix Pin-Layout on Galaxy Tab 2

Fix a long standing lockscreen layout problem that was introduced in 4.2
e.g. on P3100 and P5100

Change-Id: Ie6e35e48bbe925f3ce6672c1ed194e47e2728ada
Before: http://i.imgur.com/NETsfBy.png
After: http://i.imgur.com/kUzkR1Y.jpg