phy: amlogic: meson-g12a-usb2: fix Wvoid-pointer-to-enum-cast warning

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

phy-meson-g12a-usb2.c:322:17: error: cast to smaller integer type 'enum meson_soc_id' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast]

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Neil Armstrong <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/phy/amlogic/phy-meson-g12a-usb2.c

···
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	priv->soc_id = (enum meson_soc_id)of_device_get_match_data(&pdev->dev);
+	priv->soc_id = (uintptr_t)of_device_get_match_data(&pdev->dev);
 
 	priv->regmap = devm_regmap_init_mmio(dev, base,
 					     &phy_meson_g12a_usb2_regmap_conf);