FROMGIT: Bluetooth: Allow driver specific cmd timeout handling

Add a hook to allow the BT driver to do device or command specific
handling in case of timeouts. This is to be used by Intel driver to
reset the device after certain number of timeouts.

Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
(cherry picked from commit e2bef384
 git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master)

BUG=b:80089559
TEST=Test by simulating BT timeouts by instrumenting the kernel

Change-Id: I9a3b1e17c492a4fd1e2bc93cb73df97d278c2a6c
Reviewed-on: https://chromium-review.googlesource.com/1435751


Commit-Ready: Rajat Jain <rajatja@chromium.org>
Tested-by: Rajat Jain <rajatja@chromium.org>
Reviewed-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>