hw/net/fsl_etsec: Set eTSEC device description and category

Add description and set category for eTSEC device so it shows up
better in -device help.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Bernhard Beschow <shentey@gmail.com>
Message-ID: <20250218155407.838774E600E@zero.eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/net/fsl_etsec/etsec.c

@@ -423,8 +423,10 @@ static void etsec_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = etsec_realize;
+    dc->desc = "Freescale Enhanced Three-Speed Ethernet Controller";
     device_class_set_legacy_reset(dc, etsec_reset);
     device_class_set_props(dc, etsec_properties);
+    set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
 }
 
 static const TypeInfo etsec_types[] = {