Staging fixes for 3.13-rc2

Here are a number of staging, and IIO driver, fixes for 3.13-rc2 that
resolve issues that have been reported for 3.13-rc1.  All of these have
been in linux-next for a bit this week.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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