i2c: at91: Fix the functionality flags of the slave-only interface

When an I2C adapter acts only as a slave, it should not claim to
support I2C master capabilities.

Fixes: 9d3ca54 ("i2c: at91: added slave mode support")
Signed-off-by: Jean Delvare <[email protected]>
Cc: Juergen Fitschen <[email protected]>
Cc: Ludovic Desroches <[email protected]>
Cc: Codrin Ciubotariu <[email protected]>
Cc: Andi Shyti <[email protected]>
Cc: Nicolas Ferre <[email protected]>
Cc: Alexandre Belloni <[email protected]>
Cc: Claudiu Beznea <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

Author: jdelvare

drivers/i2c/busses/i2c-at91-slave.c

@@ -106,8 +106,7 @@ static int at91_unreg_slave(struct i2c_client *slave)
 
 static u32 at91_twi_func(struct i2c_adapter *adapter)
 {
-	return I2C_FUNC_SLAVE | I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL
-		| I2C_FUNC_SMBUS_READ_BLOCK_DATA;
+	return I2C_FUNC_SLAVE;
 }
 
 static const struct i2c_algorithm at91_twi_algorithm_slave = {