linux-firmware: add IO Edgeport USB Serial firmware

Preparing for kernel versions without firmware.

Signed-off-by: Bjørn Mork <bjorn@mork.no>

package/firmware/linux-firmware/edgeport.mk

@@ -0,0 +1,12 @@
+Package/edgeport-firmware = $(call Package/firmware-default,USB Inside Out Edgeport Serial Driver firmware)
+define Package/edgeport-firmware/install
+	$(INSTALL_DIR) $(1)/lib/firmware/edgeport
+	$(INSTALL_DATA) \
+		$(PKG_BUILD_DIR)/edgeport/boot.fw \
+		$(PKG_BUILD_DIR)/edgeport/boot2.fw \
+		$(PKG_BUILD_DIR)/edgeport/down.fw \
+		$(PKG_BUILD_DIR)/edgeport/down2.fw \
+		$(1)/lib/firmware/edgeport
+endef
+
+$(eval $(call BuildPackage,edgeport-firmware))