MAINTAINERS: ARM: BCM63xx: Update git and mailing-lists

arm-bcm63xx.git has not been used for development, instead, all patches
have been added to stblinux.git, so reflect that. While at it, add
bcm-kernel-feedback-list@broadcom.com as a secondary list to include
submissions, and finally update LAKML to reflect that it is moderated.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -2383,8 +2383,9 @@ F:	arch/arm/boot/dts/bcm470*
 
 BROADCOM BCM63XX ARM ARCHITECTURE
 M:	Florian Fainelli <f.fainelli@gmail.com>
-L:	linux-arm-kernel@lists.infradead.org
-T:	git git://github.com/broadcom/arm-bcm63xx.git
+L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L:	bcm-kernel-feedback-list@broadcom.com
+T:	git git://github.com/broadcom/stblinux.git
 S:	Maintained
 F:	arch/arm/mach-bcm/bcm63xx.c
 F:	arch/arm/include/debug/bcm63xx.S