Staging: Fixes for me4000 pci data collection driver

[Lior Dotan]

Following Andrew Morton's review for this patch I made a patch that
fixes most of the remarks.
I've converted the sleep_on_timeout to wait_event_timeout but I
probably not in the right way.
Also I don't know what's the problem with the calls for get_user() so
I left them untouched.

Signed-off-by: Lior Dotan <liodot@xxxxxxxxx>

Attachment: me4000-code-fixes.patch
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