coyote

Patch from Stefan Sorensen

On the ixdp425 and coyote platforms, the plat_serial8250_port arrays are
missing the terminating entry required by serial8250_probe.
Signed-off-by: NStefan Sorensen <ssoe@kirktelecom.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>