9p: Kill unused variable 'ret' in trans_rdma.c:parse_opts()

Probably just cut and pasted from the other parse_opts() implementations
in the 9p sources.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/9p/trans_rdma.c

@@ -167,7 +167,6 @@ static int parse_opts(char *params, struct p9_rdma_opts *opts)
 	substring_t args[MAX_OPT_ARGS];
 	int option;
 	char *options, *tmp_options;
-	int ret;
 
 	opts->port = P9_PORT;
 	opts->sq_depth = P9_RDMA_SQ_DEPTH;
@@ -195,7 +194,6 @@ static int parse_opts(char *params, struct p9_rdma_opts *opts)
 		if (r < 0) {
 			P9_DPRINTK(P9_DEBUG_ERROR,
 				   "integer field, but no integer?\n");
-			ret = r;
 			continue;
 		}
 		switch (token) {