Keep msec instead of jiffies in this define. This is needed by following
patch where we want this timeout to be exposed in debugfs.

Note: Value of this timeout comes from recommendation in BT Core Spec.4.0,
Vol 3, Part C, chapter 13.2.1.
Signed-off-by: NLukasz Rymanowski <lukasz.rymanowski@tieto.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>