MAINTAINERS: Update info for Raspberry Pi

Add RPi config files and custodian repository.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index c60f195..de49994 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -160,7 +160,7 @@
 F:	drivers/pinctrl/aspeed/
 N:	aspeed
 
-ARM BROADCOM BCM283X
+ARM BROADCOM BCM283X / BCM27XX
 M:	Matthias Brugger <mbrugger@suse.com>
 S:	Maintained
 F:	arch/arm/dts/bcm283*
@@ -175,6 +175,8 @@
 F:	include/dm/platform_data/serial_bcm283x_mu.h
 F:	include/dt-bindings/pinctrl/bcm2835.h
 F:	drivers/pinctrl/broadcom/
+F:	configs/rpi_*
+T:	git https://source.denx.de/u-boot/custodians/u-boot-arm.git
 
 ARM BROADCOM BCMSTB
 M:	Thomas Fitzsimmons <fitzsim@fitzsim.org>