kernel: provide kmod-fixed-phy as separate kmod

Almost all targets have the fixed-phy feature built into the kernel.
One big exception is x86. This caused a problem with the upcoming
LAN78xx usb driver. Hence this patch breaks out the fixed-phy from
of_mdio (which didn't include the .ko) and puts into a separate
module.

Signed-off-by: Christian Lamparter <[email protected]>

package/kernel/linux/modules/netdevices.mk

@@ -1034,13 +1034,28 @@ endef
 
 $(eval $(call KernelPackage,forcedeth))
 
+define KernelPackage/fixed-phy
+  SUBMENU:=$(NETWORK_DEVICES_MENU)
+  TITLE:=MDIO Bus/PHY emulation with fixed speed/link PHYs
+  DEPENDS:=+kmod-libphy
+  KCONFIG:=CONFIG_FIXED_PHY
+  FILES:=$(LINUX_DIR)/drivers/net/phy/fixed_phy.ko
+  AUTOLOAD:=$(call AutoProbe,fixed_phy)
+endef
+
+define KernelPackage/fixed-phy/description
+ Kernel driver for "fixed" MDIO Bus to cover the boards
+ and devices that use PHYs that are not connected to the real MDIO bus.
+endef
+
+$(eval $(call KernelPackage,fixed-phy))
+
 define KernelPackage/of-mdio
   SUBMENU:=$(NETWORK_DEVICES_MENU)
   TITLE:=OpenFirmware MDIO support
-  DEPENDS:=+kmod-libphy @!TARGET_x86
+  DEPENDS:=+kmod-libphy +kmod-fixed-phy @!TARGET_x86
   KCONFIG:=CONFIG_OF_MDIO
   FILES:= \
-	$(LINUX_DIR)/drivers/net/phy/fixed_phy.ko \
 	$(LINUX_DIR)/drivers/of/[email protected] \
 	$(LINUX_DIR)/drivers/net/mdio/[email protected]
   AUTOLOAD:=$(call AutoLoad,41,of_mdio)