[PATCH] I2C: Move hwmon drivers (3/3)

Part 3: Move the drivers documentation, plus two general documentation
files.

Note that the patch "adds trailing whitespace", because it does move the
files as-is, and some files happen to have trailing whitespace.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>