kernel: 5.10: add missing dependency in kmod-mdio-devres

Add conditional dependency on kmod-of-mdio due to mdio_devres.c code:
  #if IS_ENABLED(CONFIG_OF_MDIO)
  ...
  EXPORT_SYMBOL(devm_of_mdiobus_register);
  #endif /* CONFIG_OF_MDIO */

Fixes: 95a3741d17 ("kernel: support new mdio_devres.ko module in 5.10")
Reported-by: Rosen Penev <[email protected]>
Signed-off-by: Tony Ambardar <[email protected]>

package/kernel/linux/modules/netdevices.mk

@@ -141,7 +141,7 @@ $(eval $(call KernelPackage,mii))
 define KernelPackage/mdio-devres
   SUBMENU:=$(NETWORK_DEVICES_MENU)
   TITLE:=Supports MDIO device registration
-  DEPENDS:=@LINUX_5_10 +kmod-libphy
+  DEPENDS:=@LINUX_5_10 +kmod-libphy PACKAGE_kmod-of-mdio:kmod-of-mdio
   KCONFIG:=CONFIG_MDIO_DEVRES
   HIDDEN:=1
   FILES:=$(LINUX_DIR)/drivers/net/phy/mdio_devres.ko