Kconfig options now belong to the Kconfig domain, therefore, the
:kconfig:option: role needs to be used.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Add information about supported protocols in PPP and link to
net-tools that contains information how to test ppp against
pppd running in Linux.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
