video: Allocate the MXSFB framebuffer aligned

Allocate the framebuffer aligned so it can be flushed
and the flush_dcache_range() function won't complain.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>

drivers/video/mxsfb.c

@@ -161,7 +161,8 @@ void *video_hw_init(void)
 	panel.memSize = mode.xres * mode.yres * panel.gdfBytesPP;
 
 	/* Allocate framebuffer */
-	fb = malloc(panel.memSize);
+	fb = memalign(ARCH_DMA_MINALIGN,
+		      roundup(panel.memSize, ARCH_DMA_MINALIGN));
 	if (!fb) {
 		printf("MXSFB: Error allocating framebuffer!\n");
 		return NULL;