Bluetooth: MGMT: Fix possible deadlocks

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: Fix possible deadlocks

This fixes possible deadlocks like the following caused by
hci_cmd_sync_dequeue causing the destroy function to run:

INFO: task kworker/u19:0:143 blocked for more than 120 seconds.
Tainted: G W O 6.8.0-2024-03-19-intel-next-iLS-24ww14 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u19:0 state:D stack:0 pid:143 tgid:143 ppid:2 flags:0x00004000
Workqueue: hci0 hci_cmd_sync_work [bluetooth]
Call Trace:
<TASK>
__schedule+0x374/0xaf0
schedule+0x3c/0xf0
schedule_preempt_disabled+0x1c/0x30
__mutex_lock.constprop.0+0x3ef/0x7a0
__mutex_lock_slowpath+0x13/0x20
mutex_lock+0x3c/0x50
mgmt_set_connectable_complete+0xa4/0x150 [bluetooth]
? kfree+0x211/0x2a0
hci_cmd_sync_dequeue+0xae/0x130 [bluetooth]
? __pfx_cmd_complete_rsp+0x10/0x10 [bluetooth]
cmd_complete_rsp+0x26/0x80 [bluetooth]
mgmt_pending_foreach+0x4d/0x70 [bluetooth]
__mgmt_power_off+0x8d/0x180 [bluetooth]
? _raw_spin_unlock_irq+0x23/0x40
hci_dev_close_sync+0x445/0x5b0 [bluetooth]
hci_set_powered_sync+0x149/0x250 [bluetooth]
set_powered_sync+0x24/0x60 [bluetooth]
hci_cmd_sync_work+0x90/0x150 [bluetooth]
process_one_work+0x13e/0x300
worker_thread+0x2f7/0x420
? __pfx_worker_thread+0x10/0x10
kthread+0x107/0x140
? __pfx_kthread+0x10/0x10
ret_from_fork+0x3d/0x60
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1b/0x30
</TASK>