auxbus: Eliminate aux_create_slave()

aux_create_slave() has become a trivial wrapper around qdev_new().
There's just one user.  Eliminate.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200610053247.1583243-35-armbru@redhat.com>

hw/display/xlnx_dp.c

@@ -1249,7 +1249,7 @@ static void xlnx_dp_init(Object *obj)
     /*
      * Initialize DPCD and EDID..
      */
-    s->dpcd = DPCD(aux_create_slave(s->aux_bus, "dpcd"));
+    s->dpcd = DPCD(qdev_new("dpcd"));
     object_property_add_child(OBJECT(s), "dpcd", OBJECT(s->dpcd));
 
     s->edid = I2CDDC(qdev_new("i2c-ddc"));

hw/misc/auxbus.c

@@ -273,15 +273,6 @@ static void aux_slave_dev_print(Monitor *mon, DeviceState *dev, int indent)
                    memory_region_size(s->mmio));
 }
 
-DeviceState *aux_create_slave(AUXBus *bus, const char *type)
-{
-    DeviceState *dev;
-
-    dev = qdev_new(type);
-    assert(dev);
-    return dev;
-}
-
 void aux_init_mmio(AUXSlave *aux_slave, MemoryRegion *mmio)
 {
     assert(!aux_slave->mmio);

include/hw/misc/auxbus.h

@@ -131,13 +131,6 @@ I2CBus *aux_get_i2c_bus(AUXBus *bus);
  */
 void aux_init_mmio(AUXSlave *aux_slave, MemoryRegion *mmio);
 
-/* aux_create_slave: Create a new device on an AUX bus
- *
- * @bus The AUX bus for the new device.
- * @name The type of the device to be created.
- */
-DeviceState *aux_create_slave(AUXBus *bus, const char *name);
-
 /* aux_map_slave: Map the mmio for an AUX slave on the bus.
  *
  * @dev The AUX slave.