usb: gadget: f_midi: enable use of the index parameter

The soundcard index to use for the ALSA device creation is passed as a
parameter to f_midi_bind_config(), but is assigned to midi->index only
after the call to f_midi_register_card(midi). So no matter what is passed
to f_midi_bind_config(), the actual index for snd_card_new() is always 0.
This probably works ok if at the moment of f_midi's bind there are no
other snd_cards, but if there are, it is not possible to bind f_midi.

This patch moves the assignment to a place before the call to
f_midi_register_card(midi).
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/function/f_midi.c

@@ -954,6 +954,7 @@ int __init f_midi_bind_config(struct usb_configuration *c,
 	/* set up ALSA midi devices */
 	midi->in_ports = in_ports;
 	midi->out_ports = out_ports;
+	midi->index = index;
 	status = f_midi_register_card(midi);
 	if (status < 0)
 		goto setup_fail;
@@ -966,7 +967,6 @@ int __init f_midi_bind_config(struct usb_configuration *c,
 	midi->func.disable     = f_midi_disable;
 
 	midi->id = kstrdup(id, GFP_KERNEL);
-	midi->index = index;
 	midi->buflen = buflen;
 	midi->qlen = qlen;