fbdev: propagate result of fb_videomode_from_videomode()
fbdev: propagate result of fb_videomode_from_videomode()

fb_videomode_from_videomode() may fail, but of_get_fb_videomode()
silently covers this fact. Instead, trow the error code to the
caller.

Signed-off-by: Vladimir Murzin <8a03c763a669ed2bd45a189ce31c156513f9693a@arm.com>
Signed-off-by: Tomi Valkeinen <e1ca4dbb8be1acaf20734fecd2da10ed1d46a9bb@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs