Implement debugfs_create_str() to easily display names and such in
debugfs.
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: NValentin Schneider <valentin.schneider@arm.com>
Link: https://lkml.kernel.org/r/20210412102001.415407080@infradead.org