spi: sc18is602: fix Wvoid-pointer-to-enum-cast warning

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

  spi-sc18is602.c:269:12: error: cast to smaller integer type 'enum chips' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230810091247.70149-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-sc18is602.c

@@ -266,7 +266,7 @@ static int sc18is602_probe(struct i2c_client *client)
 	hw->ctrl = 0xff;
 
 	if (client->dev.of_node)
-		hw->id = (enum chips)of_device_get_match_data(&client->dev);
+		hw->id = (uintptr_t)of_device_get_match_data(&client->dev);
 	else
 		hw->id = id->driver_data;