rtc: rv8803: fix Wvoid-pointer-to-enum-cast warning

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

  rtc-rv8803.c:648:18: error: cast to smaller integer type 'enum rv8803_type' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230810103902.151145-2-krzysztof.kozlowski@linaro.orgSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-rv8803.c

@@ -645,8 +645,7 @@ static int rv8803_probe(struct i2c_client *client)
 	mutex_init(&rv8803->flags_lock);
 	rv8803->client = client;
 	if (client->dev.of_node) {
-		rv8803->type = (enum rv8803_type)
-			of_device_get_match_data(&client->dev);
+		rv8803->type = (uintptr_t)of_device_get_match_data(&client->dev);
 	} else {
 		const struct i2c_device_id *id = i2c_match_id(rv8803_id, client);