MAINTAINERS: co-maintain random.c

random.c is a bit understaffed, and folks want more prompt reviews. I've
got the crypto background and the interest to do these reviews, and have
authored parts of the file already.

Cc: Theodore Ts'o <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Jason A. Donenfeld <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: zx2c4

MAINTAINERS

@@ -15979,6 +15979,7 @@ F:	arch/mips/generic/board-ranchu.c
 
 RANDOM NUMBER DRIVER
 M:	"Theodore Ts'o" <[email protected]>
+M:	Jason A. Donenfeld <[email protected]>
 S:	Maintained
 F:	drivers/char/random.c