i2c: ibm_iic: don't check number of messages in the driver

Since commit 1eace834 ("i2c: add param sanity check to
i2c_transfer()"), the I2C core does this check now. We can remove it
from drivers.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Reviewed-by: NPeter Rosin <peda@axentia.se>

drivers/i2c/busses/i2c-ibm_iic.c

@@ -561,9 +561,6 @@ static int iic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 
 	DBG2("%d: iic_xfer, %d msg(s)\n", dev->idx, num);
 
-	if (!num)
-		return 0;
-
 	/* Check the sanity of the passed messages.
 	 * Uhh, generic i2c layer is more suitable place for such code...
 	 */