kernfs: bring names in comments in line with code

Fix two stragglers in the comments of the below rename operation.

Fixes: adc5e8b5 ("kernfs: drop s_ prefix from kernfs_node members")
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20201015185726.1386868-1-willemdebruijn.kernel@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>