Previously mount options were copied and updated in the cifs_sb_info
struct only when CONFIG_CIFS_DFS_UPCALL was enabled.  Making this
information generally available allows us to remove a number of ifdefs,
extra function params, and temporary variables.
Reviewed-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSean Finney <seanius@seanius.net>
Signed-off-by: NSteve French <sfrench@us.ibm.com>