drivers/hwmon/vt8231.c: fix continuation line formats

String constants that are continued on subsequent lines with \ will cause
spurious whitespace in the resulting output.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Roger Lucas <vt8231@hiddenengine.co.uk>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>