usb: gadget: midi: free hs descriptors

commit d185039f7982eb82cf8d03b6fb6689587ca5af24 upstream.

The HS descriptors are only created if HS is supported by the UDC but we
never free them.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/f_midi.c b/drivers/usb/gadget/f_midi.c
index 2f7e8f2..1bf9596 100644
--- a/drivers/usb/gadget/f_midi.c
+++ b/drivers/usb/gadget/f_midi.c
@@ -416,6 +416,7 @@
 	midi->id = NULL;
 
 	usb_free_descriptors(f->descriptors);
+	usb_free_descriptors(f->hs_descriptors);
 	kfree(midi);
 }