nfsd: Remove duplicate macro define for max sec label length

NFS4_MAXLABELLEN has defined for sec label max length, use it directly.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 5c0aa74..cea6c52 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -424,7 +424,7 @@
 		len += 4;
 		dummy32 = be32_to_cpup(p++);
 		READ_BUF(dummy32);
-		if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
+		if (dummy32 > NFS4_MAXLABELLEN)
 			return nfserr_badlabel;
 		len += (XDR_QUADLEN(dummy32) << 2);
 		READMEM(buf, dummy32);