git-mailrc: Add rpi and bcm283x maintainer

Add entries for bcm283x and rpi prefix.

Signed-off-by: Andrei Gherzan <andrei@balena.io>
[mb: add commit message]
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
diff --git a/doc/git-mailrc b/doc/git-mailrc
index a63b76b..1d36f58 100644
--- a/doc/git-mailrc
+++ b/doc/git-mailrc
@@ -35,6 +35,7 @@
 alias masahiro       Masahiro Yamada <yamada.masahiro@socionext.com>
 alias mateusz        Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
 alias maxime         Maxime Ripard <maxime.ripard@free-electrons.com>
+alias mbrugger       Matthias Brugger <mbrugger@suse.com>
 alias monstr         Michal Simek <monstr@monstr.eu>
 alias prom           Minkyu Kang <mk7.kang@samsung.com>
 alias ptomsich       Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
@@ -74,6 +75,9 @@
 alias zynq           uboot, monstr
 alias rockchip       uboot, sjg, kevery, ptomsich
 
+alias bcm283x        uboot, mbrugger
+alias rpi            uboot, mbrugger
+
 alias m68k           uboot, alisonwang, angelo_ts
 alias coldfire       m68k