MAINTAINERS: Update file patterns for WOLFSON MICROELECTRONICS PMIC DRIVERS

One of the includes pointed to a non-existent directory
Add Documentation/hwmon/wm83??
Add sound/soc/codecs/wm(8350|8400).h files

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>