accel/tcg: Rename tcg_init to tcg_init_machine

We shortly want to use tcg_init for something else.
Since the hook is called init_machine, match that.

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg/tcg-all.c

@@ -105,7 +105,7 @@ static void tcg_accel_instance_init(Object *obj)
 
 bool mttcg_enabled;
 
-static int tcg_init(MachineState *ms)
+static int tcg_init_machine(MachineState *ms)
 {
     TCGState *s = TCG_STATE(current_accel());
 
@@ -189,7 +189,7 @@ static void tcg_accel_class_init(ObjectClass *oc, void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
     ac->name = "tcg";
-    ac->init_machine = tcg_init;
+    ac->init_machine = tcg_init_machine;
     ac->allowed = &tcg_allowed;
 
     object_class_property_add_str(oc, "thread",