Convert bluetooth mesh to using k_timeout struct. Many of the mesh
modules uses timeout calculations, so it is most practical to keep
the s32_t type and only initialize a k_timeout_t struct when
calling the kernel.
Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
Splits PB-ADV and PB-GATT into separate modules with a common interface
to modularize prov.c.
Additional trivial fixes from testing:
- Reduces warnings for normal occurances like repeated packets.
- Makes link ack a non-reliable packet to prevent it from being repeated
until prov invite.
- Provisioner does not send link fail, but closes the link (as per spec
section 5.4.4). This prevents lingering zombie links on both sides.
Signed-off-by: Trond Einar Snekvik <Trond.Einar.Snekvik@nordicsemi.no>
