P31XX: Use fake shadows and hardware layers for recents

SGX540 doesn't have the greatest graphics performance.

Change-Id: Id73427b5f24a473765caa344604f19a81f6ccabc
P3100: temporary fix for bootanimation causing PVR crashes

http://pastebin.com/VqqViHv6

Change-Id: I69bde1f41f4a6a50dc06ac9e92a54421e4cdaf42