[ARM] 5358/1: AT2440EVB: Use new include path of mci.h

Since mci.h has been moved, use the new include path.

Signed-off-by: Ramax Lo <ramaxlo@gmail.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>