util/lint: update kconfig_lint
* Add check for '#if defined' as well as #ifdef
* Add check for IS_ENABLED() around bools in #if statements.
* Fix an incomplete comment.
Change-Id: I0787eab80ae64f59664fb53f395389bf5ac2a067
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20360
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>