With the recent rename of documentation -> Documentation, the checkpatch.pl script broke. Fix the tree check, and change the user visible output of "kernel" to coreboot. Change-Id: I34f538d4436e468b1c91eb36aa2f60a2a3308111 Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: http://review.coreboot.org/10125 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>