linux-wandboard

ENGR00243077 Fixed JB4.2 multi-user switch hang issue

Gpu virtual memory has potiential hang issue exposed,
Vivante will fix this hang issue with 4K contigueous memory limit.

4K limit is needless now and should be disabled by default.

Signed-off-by: Xianzhong <b07117@freescale.com>
Acked-by: Lily Zhang