Staging: iio: kill off spurious semicolons

A bunch of IIO files contain spurious semicolons after function
definitions and case statements and if statements.  Guess people
really like this thing, but kill them anyways so they'll stop
spreading via copy & paste with new drivers.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>