[CIFS] remove unused funtion compile warning when experimental off

get rid of couple of unused function warnings which
show up when CONFIG_CIFS_EXPERIMENTAL is not defined - wrap them in
#ifdef CONFIG_CIFS_EXPERIMENTAL. Patch against current git.
Signed-off-by: NParag Warudkar <kernel-stuff@comcast.net>
Signed-off-by: NSteve French <sfrench@us.ibm.com>

fs/cifs/cifssmb.c

@@ -2486,6 +2486,7 @@ CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon,
 	return rc;
 }
 
+#ifdef CONFIG_CIFS_EXPERIMENTAL
 /* Initialize NT TRANSACT SMB into small smb request buffer.
    This assumes that all NT TRANSACTS that we init here have
    total parm and data under about 400 bytes (to fit in small cifs
@@ -2569,6 +2570,7 @@ validate_ntransact(char *buf, char **ppparm, char **ppdata,
 	}
 	return 0;
 }
+#endif /* CIFS_EXPERIMENTAL */
 
 int
 CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,