Bluetooth: btusb: Fix memory leak in Intel setup routine

[ Upstream commit ecffc80478cdce122f0ecb6a4e4f909132dd5c47 ]

The SKB returned from the Intel specific version information command is
missing a kfree_skb.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>