Everytime a dead driver is removed from the list,
we must re-number. This is a painful task.
Try
git show e53232250 -- doc/driver-model/UDM-serial.txt
git show 6f62f4207 -- doc/driver-model/UDM-serial.txt
git show b9f4bc34a -- doc/driver-model/UDM-serial.txt
to see what I mean.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>