rockchip: fix build with kernel 6.12

Author: coolsnowwolf

target/linux/rockchip/patches-6.12/113-ethernet-stmicro-stmmac-Add-SGMII-QSGMII-support.patch

@@ -260,9 +260,9 @@ Signed-off-by: David Wu <david.wu@rock-chips.com>
  	struct regulator *ldo = bsp_priv->regulator;
  	int ret;
 @@ -1832,6 +2002,18 @@ static struct rk_priv_data *rk_gmac_setu
- 							"rockchip,grf");
- 	bsp_priv->php_grf = syscon_regmap_lookup_by_phandle(dev->of_node,
- 							    "rockchip,php-grf");
+ 			return ERR_CAST(bsp_priv->php_grf);
+ 		}
+ 	}
 +	bsp_priv->xpcs = syscon_regmap_lookup_by_phandle(dev->of_node,
 +							 "rockchip,xpcs");
 +	if (!IS_ERR(bsp_priv->xpcs)) {