ENGR00142551-2 IPUv3 FB:Support HW triple buffer

ENGR00142551-2 IPUv3 FB:Support HW triple buffer

This patch supports HW triple buffer for IPUv3
framebuffer.
1) Remove buf ready check in EOF irq handler, as we
   think the swap logic will not fail for HW triple
   buffer case.
2) When V4L2 output/overlay are used, switch to double
   buffer mode.
3) Changes IPU interface for IPUv1 framebuffer to pass
   building.

Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Jason Chen <b02280@freescale.com>
(cherry picked from commit 4ada3031e13207902f8c90b33c082759889cb22a)