fabrics: fix fabrics_connect() error message

Seeing below error message displayed during nvme connect error
scenarios:

failed to connected: Unknown error -1013

Fix this by ensuring the appropriate ret value is passed to
nvme_strerror(). And while at it, correct the message text grammar
as well.

Signed-off-by: Martin George <[email protected]>

Author: martin-gpy

fabrics.c

@@ -708,8 +708,8 @@ int fabrics_connect(const char *desc, int argc, char **argv)
 
 	ret = nvmf_connect(ctx, fctx);
 	if (ret) {
-		fprintf(stderr, "failed to connected: %s\n",
-			nvme_strerror(ret));
+		fprintf(stderr, "failed to connect: %s\n",
+			nvme_strerror(-ret));
 		return ret;
 	}