MAINTAINERS: move F: line so that it does not break S: line info

Move F: line so that it doesn't break the S: line and its
explanations.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Reported-by: Jianjun Kong <kongjianjun@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>