BACKPORT: UPSTREAM: Bluetooth: Introduce debug feature when dynamic debug is disabled

In case dynamic debug is disabled, this feature allows a vendor platform
to provide debug statement printing.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
(cherry picked from commit e625e50ceee18bc1e3fb1a6375e089405a797a4d)

BUG=b:148227743
TEST=Build, see Cq-Depend CL for test details

Signed-off-by: Alain Michaud <alainm@chromium.org>
Cq-Depend: chromium:2280063
Change-Id: I140274db3a3e727426477bc794316c8bd70e0239
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2280442
Reviewed-by: Archie Pusaka <apusaka@chromium.org>
4 files changed