mx5: Rename mx51_fb_init()

The ipuv3 driver is currently only used on mx51, but it can be extended to work
on mx53 and mx6 as well.

Rename mx51_fb_init(), so that it can be used by other SoCs.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Jason Liu <r64343@freescale.com>
diff --git a/board/ttcontrol/vision2/vision2.c b/board/ttcontrol/vision2/vision2.c
index 282de95..d68bef7 100644
--- a/board/ttcontrol/vision2/vision2.c
+++ b/board/ttcontrol/vision2/vision2.c
@@ -604,7 +604,7 @@
 	gpio_set_value(2, 1);
 	mxc_request_iomux(MX51_PIN_GPIO1_2, IOMUX_CONFIG_ALT0);
 
-	ret = mx51_fb_init(&nec_nl6448bc26_09c, 0, IPU_PIX_FMT_RGB666);
+	ret = ipuv3_fb_init(&nec_nl6448bc26_09c, 0, IPU_PIX_FMT_RGB666);
 	if (ret)
 		puts("LCD cannot be configured\n");
 }