cifs: fix print of hdr_flags in dfscache_proc_show()

Reorder the parameters in seq_printf() to correctly print header
flags.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>