MAINTAINERS: split Monitor (QMP/HMP) entry

This entry doesn't reflect reality for a few years now. This commit
splits it into Human Monitor (HMP), QAPI and QMP. Markus is dropped
as a maintainer.

This is what we have been for the last few years. Also, it's going
to help me to offload some of this work to someone else in the near
future.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>

MAINTAINERS

@@ -685,11 +685,12 @@ M: Anthony Liguori <aliguori@us.ibm.com>
 S: Supported
 F: vl.c
 
-Monitor (QMP/HMP)
+Human Monitor (HMP)
 M: Luiz Capitulino <lcapitulino@redhat.com>
-M: Markus Armbruster <armbru@redhat.com>
 S: Supported
 F: monitor.c
+F: hmp.c
+F: hmp-commands.hx
 
 Network device layer
 M: Anthony Liguori <aliguori@us.ibm.com>
@@ -706,6 +707,12 @@ F: nbd.*
 F: qemu-nbd.c
 T: git git://github.com/bonzini/qemu.git nbd-next
 
+QAPI
+M: Luiz Capitulino <lcapitulino@redhat.com>
+M: Michael Roth <mdroth@linux.vnet.ibm.com>
+S: Supported
+F: qapi/
+
 QAPI Schema
 M: Eric Blake <eblake@redhat.com>
 M: Luiz Capitulino <lcapitulino@redhat.com>
@@ -713,6 +720,14 @@ M: Markus Armbruster <armbru@redhat.com>
 S: Supported
 F: qapi-schema.json
 
+QMP
+M: Luiz Capitulino <lcapitulino@redhat.com>
+S: Supported
+F: qmp.c
+F: monitor.c
+F: qmp-commands.hx
+F: QMP/
+
 SLIRP
 M: Jan Kiszka <jan.kiszka@siemens.com>
 S: Maintained