ARM: BCM5301X: Ignore another (BCM4709 specific) fault code

Broadcom ARM devices seem to generate some fault once per boot. We
already have an ignoring handler for BCM4707/BCM4708, but BCM4709
generates different code.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>