[CIFS] Remove unneeded QuerySymlink call and fix mapping for unmapped status

Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/smberr.h

@@ -110,6 +110,7 @@
 
 /* Below errors are used internally (do not come over the wire) for passthrough
    from STATUS codes to POSIX only  */
+#define ERRsymlink              0xFFFD
 #define ErrTooManyLinks         0xFFFE
 
 /* Following error codes may be generated with the ERRSRV error class.*/