[PATCH] aoe [6/8]: update device information on last close

Instead of making the user wait or do it manually, refresh
device information on its last close by issuing a config
query to the device.

Signed-off-by: "Ed L. Cashin" <ecashin@coraid.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>