MAINTAINERS: Add myself as HPPA maintainer

Since I contribute quite some code to hppa, I'd like to step up and
become the secondary maintainer for HPPA beside Richard.
Additionally change status of hppa machines to maintained as I will
take care of them.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

MAINTAINERS

@@ -251,6 +251,7 @@ F: target/hexagon/gen_idef_parser_funcs.py
 
 HPPA (PA-RISC) TCG CPUs
 M: Richard Henderson <richard.henderson@linaro.org>
+M: Helge Deller <deller@gmx.de>
 S: Maintained
 F: target/hppa/
 F: disas/hppa.c
@@ -1188,8 +1189,8 @@ HP-PARISC Machines
 ------------------
 HP B160L, HP C3700
 M: Richard Henderson <richard.henderson@linaro.org>
-R: Helge Deller <deller@gmx.de>
-S: Odd Fixes
+M: Helge Deller <deller@gmx.de>
+S: Maintained
 F: configs/devices/hppa-softmmu/default.mak
 F: hw/display/artist.c
 F: hw/hppa/