EDAC/highbank: Handover Calxeda Highbank maintenance to Andre Przywara

I do not have hardware anymore, nor there is ongoing development. So
handover maintenance to Andre who already maintains the last remainings
of Calxeda.
Signed-off-by: Robert Richter <rric@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20200824124931.2933-1-rric@kernel.org

MAINTAINERS

@@ -6166,7 +6166,7 @@ S:	Supported
 F:	drivers/edac/bluefield_edac.c
 
 EDAC-CALXEDA
-M:	Robert Richter <rric@kernel.org>
+M:	Andre Przywara <andre.przywara@arm.com>
 L:	linux-edac@vger.kernel.org
 S:	Maintained
 F:	drivers/edac/highbank*