[PATCH] IPMI: add poll delay

Make sure to delay a little in the IPMI poll routine so we can pass in a
timeout time and thus time things out.

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