[PATCH] Fix error path in Video4Linux dpc7146 driver

The I2C adapter wasn't de-registered correctly in case the video card
wasn't found.  When the I2C subsystem tried to speak with the dangling
I2C adapter later on, usually an oops happened.

drivers/media/video/dpc7146.c

@@ -123,6 +123,7 @@ static int dpc_probe(struct saa7146_dev* dev)
 	/* check if all devices are present */
 	if( 0 == dpc->saa7111a ) {
 		DEB_D(("dpc_v4l2.o: dpc_attach failed for this device.\n"));	
+		i2c_del_adapter(&dpc->i2c_adapter);
 		kfree(dpc);
 		return -ENODEV;
 	}