If we compile the WM8994 for a 64bit architecture we receive the following
warnings:
drivers/mfd/wm8994-core.c: In function ‘wm8994_i2c_probe’:
drivers/mfd/wm8994-core.c:639:19:
  warning: cast from pointer to integer of different size
    wm8994->type = (int)of_id->data;
                   ^
Signed-off-by: Lee Jones <lee.jones@linaro.org>
        if (i2c->dev.of_node) {
                of_id = of_match_device(wm8994_of_match, &i2c->dev);
                if (of_id)
-                       wm8994->type = (int)of_id->data;
+                       wm8994->type = (enum wm8994_type)of_id->data;
        } else {
                wm8994->type = id->driver_data;
        }