MAINTAINERS: add myself to lm32 and milkymist

Add myself to lm32 and milkymist files.
Signed-off-by: NMichael Walle <michael@walle.cc>

MAINTAINERS

@@ -98,8 +98,12 @@ LM32
 M: Michael Walle <michael@walle.cc>
 S: Maintained
 F: target-lm32/
+F: disas/lm32.c
 F: hw/lm32/
-F: hw/char/lm32_*
+F: hw/*/lm32_*
+F: hw/*/milkymist-*
+F: include/hw/char/lm32_juart.h
+F: include/hw/lm32/
 F: tests/tcg/lm32/
 
 M68K