[1/2] 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

Before: http://i.imgur.com/NETsfBy.png
After: http://i.imgur.com/8ghV2aG.png

Original commit: review.cyanogenmod.org/#/c/57557

Change-Id: Ia3cdc0d10217a0a2504a7287f480d9f036e66eee