NFSD: Remove unused values from nfsd4_encode_components_esc()

Clean up. The computed value of @p is saved each time through the
loop but is never used.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Author: chucklever

fs/nfsd/nfs4xdr.c

@@ -2652,13 +2652,10 @@ static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
 
 		strlen = end - str;
 		if (strlen) {
-			p = xdr_reserve_space(xdr, strlen + 4);
-			if (!p)
+			if (xdr_stream_encode_opaque(xdr, str, strlen) < 0)
 				return nfserr_resource;
-			p = xdr_encode_opaque(p, str, strlen);
 			count++;
-		}
-		else
+		} else
 			end++;
 		if (found_esc)
 			end = next;