tilo: support super large images

Support images bigger than 4 MB. At least Sun Ultra 5/10 PROM maps 10 MB,
so make that a new limit.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 files changed