i2c: Don't uselessly set i2c_adapter.retries

I2C adapter drivers are supposed to handle retries on nack by themselves
if they do, so there's no point in setting .retries if they don't.

As this retry mechanism is going away (at least in its current form),
clean this up now so that we don't get build failures later.
Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/i2c/busses/i2c-davinci.c

@@ -510,7 +510,6 @@ static int davinci_i2c_probe(struct platform_device *pdev)
 
 	/* FIXME */
 	adap->timeout = 1;
-	adap->retries = 1;
 
 	adap->nr = pdev->id;
 	r = i2c_add_numbered_adapter(adap);

drivers/i2c/busses/i2c-ibm_iic.c

@@ -736,7 +736,6 @@ static int __devinit iic_probe(struct ocp_device *ocp){
 	adap->client_register = NULL;
 	adap->client_unregister = NULL;
 	adap->timeout = 1;
-	adap->retries = 1;
 
 	/*
 	 * If "dev->idx" is negative we consider it as zero.

drivers/i2c/busses/i2c-iop3xx.c

@@ -490,7 +490,6 @@ iop3xx_i2c_probe(struct platform_device *pdev)
 	 * Default values...should these come in from board code?
 	 */
 	new_adapter->timeout = 100;	
-	new_adapter->retries = 3;
 	new_adapter->algo = &iop3xx_i2c_algo;
 
 	init_waitqueue_head(&adapter_data->waitq);

drivers/i2c/busses/i2c-mpc.c

@@ -309,7 +309,6 @@ static struct i2c_adapter mpc_ops = {
 	.algo = &mpc_algo,
 	.class = I2C_CLASS_HWMON,
 	.timeout = 1,
-	.retries = 1
 };
 
 static int fsl_i2c_probe(struct platform_device *pdev)

drivers/i2c/busses/i2c-omap.c

@@ -362,8 +362,6 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
 
 	omap_i2c_enable_clocks(dev);
 
-	/* REVISIT: initialize and use adap->retries. This is an optional
-	 * feature */
 	if ((r = omap_i2c_wait_for_bb(dev)) < 0)
 		goto out;