cifs: update super_operations to show_devname

This is needed so that we display the correct //server/share vs
\\server\share in /proc/mounts for the device name (in the new
mount API).

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
This commit is contained in:
Steve French 2020-12-14 20:08:10 -06:00
commit 653a5efb84