ENGR00223797-7 MX6 SabreSD:Fix ipuv3 fb platform driver register

As there is only one IPU embedded in MX6DL and two IPUs embedded
in MX6DQ. The max ipuv3 fb platform driver number is two for
MX6DL and four for MX6DQ.
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>

arch/arm/mach-mx6/board-mx6q_sabresd.c

@@ -1712,10 +1712,10 @@ static void __init mx6_sabresd_board_init(void)
 	imx6q_add_ipuv3(0, &ipu_data[0]);
 	if (cpu_is_mx6q()) {
 		imx6q_add_ipuv3(1, &ipu_data[1]);
-		for (i = 0; i < ARRAY_SIZE(sabresd_fb_data); i++)
+		for (i = 0; i < 4 && i < ARRAY_SIZE(sabresd_fb_data); i++)
 			imx6q_add_ipuv3fb(i, &sabresd_fb_data[i]);
 	} else
-		for (i = 0; i < (ARRAY_SIZE(sabresd_fb_data) + 1) / 2; i++)
+		for (i = 0; i < 2 && i < ARRAY_SIZE(sabresd_fb_data); i++)
 			imx6q_add_ipuv3fb(i, &sabresd_fb_data[i]);
 
 	imx6q_add_vdoa();