networking: inappropriate ioctl operation should return ENOTTY

ioctl() calls against a socket with an inappropriate ioctl operation
are incorrectly returning EINVAL rather than ENOTTY:

[ENOTTY]
Inappropriate I/O control operation.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=33992

Signed-off-by: Lifeng Sun <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/core/dev.c

···
 		 * is never reached
 		 */
 		WARN_ON(1);
-		err = -EINVAL;
+		err = -ENOTTY;
 		break;
 
 	}
···
 		/* Set the per device memory buffer space.
 		 * Not applicable in our case */
 	case SIOCSIFLINK:
-		return -EINVAL;
+		return -ENOTTY;
 
 	/*
 	 *	Unknown or private ioctl.
···
 		/* Take care of Wireless Extensions */
 		if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)
 			return wext_handle_ioctl(net, &ifr, cmd, arg);
-		return -EINVAL;
+		return -ENOTTY;
 	}
 }