MAINTAINERS: add patterns to CRYPTOGRAPHIC RANDOM NUMBER GENERATOR

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>