Console subsystem is intended to be a layer between console drivers
and console clients, like e.g. shell. This change factors out code
from shell which dealed with individial console drivers and moves it
to console subsystem, under the name console_register_line_input().
To accommodate for this change, older console subsys Kconfig symbol
is changed from CONFIG_CONSOLE_PULL to CONFIG_CONSOLE_SUBSYS
(CONFIG_CONSOLE is already used by console drivers). This signifies
that console subsystem is intended to deal with all of console
aspects in Zephyr (existing and new), not just provide some "new"
functionality on top of raw console drivers, like it initially
started.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
f6d8ab8289