Bluetooth: hci_sync: Attempt to dequeue connection attempt

Bluetooth: hci_sync: Attempt to dequeue connection attempt

[ Upstream commit 881559af5f5c545f6828e7c74d79813eb886d523 ]

If connection is still queued/pending in the cmd_sync queue it means no
command has been generated and it should be safe to just dequeue the
callback when it is being aborted.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Stable-dep-of: 227a0cdf4a02 ("Bluetooth: MGMT: Fix not generating command complete for MGMT_OP_DISCONNECT")
Signed-off-by: Sasha Levin <sashal@kernel.org>