MAINTAINERS: BCM2835: Add internal Broadcom mailing list

There is a patchwork instance behind bcm-kernel-feedback-list that is
helpful to track submissions for the Broadcom ARM-SoC maintainers and
make sure there are no patches missed, add this list for the Broadcom
BCM2835 architecture.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -3110,6 +3110,7 @@ F:	arch/arm/mach-bcm/
 BROADCOM BCM2835 ARM ARCHITECTURE
 M:	Eric Anholt <eric@anholt.net>
 M:	Stefan Wahren <stefan.wahren@i2se.com>
+L:	bcm-kernel-feedback-list@broadcom.com
 L:	linux-rpi-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 T:	git git://github.com/anholt/linux