Blackfin: cm-bf527/cm-bf537: increase flash sectors
Newer revisions of these boards have slightly larger flashes, so increase
the configured number of sectors so that U-Boot works on all revisions.
Signed-off-by: Harald Krapfenbauer <Harald.Krapfenbauer@bluetechnix.at>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>