can: isotp: add local echo tx processing and tx without FC

commit 4b7fe92c upstream
commit 9f39d365 upstream
commit 05173743 upstream

Due to the existing patch order applied to isotp.c in the stable kernel the
original order of depending patches the three original patches
4b7fe92c ("can: isotp: add local echo tx processing for consecutive frames")
9f39d365 ("can: isotp: add support for transmission without flow control")
05173743 ("can: isotp: fix race between isotp_sendsmg() and isotp_release()")
can not be split into different patches that can be applied in working steps
to the stable tree.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>