linux-imx (3.0.35): Change GPU_VIV to be built-in

The galcore module does not support auto-load and to avoid manual
handling of it we should have it built-in. This changes the defconfig
file for it.

Change-Id: I559f99ef197d752d2ac0c398ad0b4180b6cc2d1f
Reported-by: Rene Fichter <rene.fichter@megger.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>