[PATCH] hdaps: small update.

- Handle dmi_system_check() elegantly, now that my bugfix is upstream.

- Add support for the X41 and R52.

- Cleanup some comments do I do not have to keep updating them with each
  new whitelisted laptop.

Signed-off-by: Robert Love <rml@novell.com>

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>