mfd: wm31x: Fix Wvoid-pointer-to-enum-cast warning

'type' is an enum, thus cast of pointer on 64-bit compile test with
W=1 causes:

  wm831x-spi.c:36:10: error: cast to smaller integer type 'enum wm831x_parent' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast]

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: krzk

drivers/mfd/wm831x-i2c.c

@@ -36,7 +36,7 @@ static int wm831x_i2c_probe(struct i2c_client *i2c)
 			dev_err(&i2c->dev, "Failed to match device\n");
 			return -ENODEV;
 		}
-		type = (enum wm831x_parent)of_id->data;
+		type = (uintptr_t)of_id->data;
 	} else {
 		type = (enum wm831x_parent)id->driver_data;
 	}

drivers/mfd/wm831x-spi.c

@@ -33,7 +33,7 @@ static int wm831x_spi_probe(struct spi_device *spi)
 			dev_err(&spi->dev, "Failed to match device\n");
 			return -ENODEV;
 		}
-		type = (enum wm831x_parent)of_id->data;
+		type = (uintptr_t)of_id->data;
 	} else {
 		type = (enum wm831x_parent)id->driver_data;
 	}