Documentation: megaraid: fix spelling "consistend" => "consistent"

Change the spelling from "consistend" to "consistent".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YFS5KV7ejNoZmt6H@mwanda


Signed-off-by: Jonathan Corbet <corbet@lwn.net>