P31XX: Fix "stop-and-go" boot animation

TARGET_BOOTANIMATION_USE_RGB565 := true
will smooth boot animation and fix stopping all the time.

Change-Id: Icbc969a3e7f2061ffaf48c3c2b9aff7ec64f6a46
Merge pull request #1 from CyanogenMod/cm-11.0

P31XX: Fix "stop-and-go" boot animation