smb: client: return reparse type in /proc/mounts

Add support for returning reparse mount option in /proc/mounts.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402262152.YZOwDlCM-lkp@intel.com/
Signed-off-by: Paulo Alcantara <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>