MAINTAINERS: Broadcom internal lists aren't maintainers

Convert the broadcom internal list M: and L: entries to R: as exploder
email addresses are neither maintainers nor mailing lists.

Reorder the entries as necessary.

Link: https://lkml.kernel.org/r/04eb301f5b3adbefdd78e76657eff0acb3e3d87f.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>