p1-common: use texture cache for bootanimation

RGB565 uses considerably less memory, and together with texture
cache, it allows us to offer a really smooth bootanimation on
not so powerful devices.

requires: https://gerrit.omnirom.org/#/c/5597/

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: I6133a3e8158346964bf76b7b17333ee6895d0e59