Coverity spotted a superfluous error check in nfs4_open_revalidate().  Remove
it.
Coverity: #cid 847
Test plan:
Code inspection; another pass through Coverity.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
                        case -EROFS:
                                lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
                                return 1;
-                       case -ENOENT:
-                               if (dentry->d_inode == NULL)
-                                       return 1;
+                       default:
+                               goto out_drop;
                }
-               goto out_drop;
        }
        if (state->inode == dentry->d_inode) {
                nfs4_intent_set_file(nd, dentry, state);