[U-Boot] cfb_console and dcache on i.MX6

[Eric Nelson]

Hi Anatolij,

Now that the SD card driver is working properly with cache,
we'd like to enable dcache on our boards, and found that this
patch is still lingering without comment:
	http://patchwork.ozlabs.org/patch/186173/

The initial comments were here:
	http://patchwork.ozlabs.org/patch/186173/

If you agree with this approach, I've update the patch
a bit to reflect that logo_plot() is now already static
and moved the cache flush from logo_plot() to video_init().

Please advise,


Eric