fs: rename show_mnt_opts -> show_vfsmnt_opts

This name is more consistent with what the helper does, which is to just
show the vfsmount options.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/fb363c62ffbf78a18095d596a19b8412aa991251.1719257716.git.josef@toxicpanda.com


Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>