This removes a bunch of duplicated boilerplate for the debugfs vs
runtime printk debug dumping.
Signed-off-by: NEric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190220210343.28157-2-eric@anholt.netReviewed-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>