video: Set up the copy framebuffer when enabled

This framebuffer is separately mapped. Update the video post-probe
function to set this up.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
1 file changed