i2c: i2c-sirf: deprecate class based instantiation

Warn users that class based instantiation is going away soon in favour
of more robust probing and faster bootup times.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: Barry Song <baohua@kernel.org>

drivers/i2c/busses/i2c-sirf.c

@@ -312,7 +312,7 @@ static int i2c_sirfsoc_probe(struct platform_device *pdev)
 		goto out;
 	}
 	adap = &siic->adapter;
-	adap->class = I2C_CLASS_HWMON;
+	adap->class = I2C_CLASS_HWMON | I2C_CLASS_DEPRECATED;
 
 	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	siic->base = devm_ioremap_resource(&pdev->dev, mem_res);