iio: dac: mcp4725: Remove unneeded conversions to bool

Found with scripts/coccinelle/misc/boolconv.cocci.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/iio/dac/mcp4725.c

@@ -476,7 +476,7 @@ static int mcp4725_probe(struct i2c_client *client,
 		goto err_disable_vref_reg;
 	}
 	pd = (inbuf[0] >> 1) & 0x3;
-	data->powerdown = pd > 0 ? true : false;
+	data->powerdown = pd > 0;
 	data->powerdown_mode = pd ? pd - 1 : 2; /* largest resistor to gnd */
 	data->dac_value = (inbuf[1] << 4) | (inbuf[2] >> 4);
 	if (data->id == MCP4726)