tcg: Simplify how dump_opcount_info() prints

dump_opcount_info() takes an fprintf()-like callback and a FILE * to
pass to it.

Its only caller hmp_info_opcount() passes monitor_fprintf() and the
current monitor cast to FILE *.  monitor_fprintf() casts it right
back, and is otherwise identical to monitor_printf().  The
type-punning is ugly.

Drop the callback, and call qemu_printf() instead.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190417191805.28198-4-armbru@redhat.com>
diff --git a/tcg/tcg.h b/tcg/tcg.h
index 32b7cf3..9f2b03f 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -1018,7 +1018,7 @@
 
 int64_t tcg_cpu_exec_time(void);
 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
-void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf);
+void tcg_dump_op_count(void);
 
 #define TCG_CT_ALIAS  0x80
 #define TCG_CT_IALIAS 0x40