MAINTAINERS: Update mach-bcm maintainers list

Add Ray Jui and Scott Branden for the mach-bcm/ entries.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -2118,6 +2118,8 @@ F:	drivers/net/ethernet/broadcom/bnx2x/
 BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITECTURE
 M:	Christian Daudt <bcm@fixthebug.org>
 M:	Florian Fainelli <f.fainelli@gmail.com>
+M:	Ray Jui <rjui@broadcom.com>
+M:	Scott Branden <sbranden@broadcom.com>
 L:	bcm-kernel-feedback-list@broadcom.com
 T:	git git://github.com/broadcom/mach-bcm
 S:	Maintained