monitor: Rename misc.c to hmp-target.c

What's left in misc.c is exactly the target-dependent part of the HMP
core.  Rename accordingly.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-33-armbru@redhat.com>

monitor/misc.c → monitor/hmp-target.c

@@ -1,5 +1,5 @@
 /*
- * QEMU monitor
+ * QEMU monitor, target-dependent part
  *
  * Copyright (c) 2003-2004 Fabrice Bellard
  *

monitor/meson.build

@@ -8,4 +8,4 @@ softmmu_ss.add(files(
 softmmu_ss.add([spice_headers, files('qmp-cmds.c')])
 
 specific_ss.add(when: 'CONFIG_SOFTMMU',
-		if_true: [files( 'hmp-cmds-target.c', 'misc.c'), spice])
+		if_true: [files( 'hmp-cmds-target.c', 'hmp-target.c'), spice])