realtek: mdio: setup polling for RTL8261

Startup of mdio on a RTL8216 based device currently shows the
following warnings.

[1.948608] skip polling setup for unknown PHY 001ccaf3 on port 0
[1.968920] skip polling setup for unknown PHY 001ccaf3 on port 8
[1.989171] skip polling setup for unknown PHY 001ccaf3 on port 16
[2.009704] skip polling setup for unknown PHY 001ccaf3 on port 20
[2.030209] skip polling setup for unknown PHY 001ccaf3 on port 24
[2.052270] realtek-otto-serdes-mdio 1b000000.switchcore:mdio-serdes:
           Realtek SerDes mdio bus initialized, 12 SerDes, 64 pages

Add the phy detection to the mdio bus so that polling setup works.
While we are here sort the phy ids alphabetically.

Signed-off-by: Markus Stockhausen <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/22109
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/realtek/files-6.12/drivers/net/mdio/mdio-realtek-otto.c

@@ -16,12 +16,13 @@
 #define RTMDIO_PHY_AQR113C_A			0x31c31c12
 #define RTMDIO_PHY_AQR113C_B			0x31c31c13
 #define RTMDIO_PHY_AQR813			0x31c31cb2
+#define RTMDIO_PHY_RTL8218D			0x001cc983
+#define RTMDIO_PHY_RTL8218E			0x001cc984
 #define RTMDIO_PHY_RTL8221B_VB_CG		0x001cc849
 #define RTMDIO_PHY_RTL8221B_VM_CG		0x001cc84a
 #define RTMDIO_PHY_RTL8224			0x001ccad0
 #define RTMDIO_PHY_RTL8226			0x001cc838
-#define RTMDIO_PHY_RTL8218D			0x001cc983
-#define RTMDIO_PHY_RTL8218E			0x001cc984
+#define RTMDIO_PHY_RTL8261			0x001ccaf3
 
 #define RTMDIO_PHY_MAC_1G			3
 #define RTMDIO_PHY_MAC_2G_PLUS			1
@@ -637,6 +638,11 @@ static int rtmdio_get_phy_info(struct mii_bus *bus, int addr, struct rtmdio_phy_
 		phyinfo->poll_adv_1000 = RTMDIO_PHY_POLL_MMD(31, 0xa412, 9);
 		phyinfo->poll_lpa_1000 = RTMDIO_PHY_POLL_MMD(31, 0xa414, 11);
 		break;
+	case RTMDIO_PHY_RTL8261:
+		phyinfo->mac_type = RTMDIO_PHY_MAC_2G_PLUS;
+		phyinfo->has_giga_lite = true;
+		phyinfo->has_res_reg = true;
+		break;
 	default:
 		pr_warn("skip polling setup for unknown PHY %08x on port %d\n", phyid, addr);
 		ret = -EINVAL;