fuse wifi and ethernet component to a sngle network component.

enable both interfaces if configured from menuconfig

Signed-off-by: Karl Osterseher <karli_o@gmx.at>

components/network_interface/include/eth_interface.h

@@ -0,0 +1,15 @@
+
+#ifndef COMPONENTS_NETWORK_INTERFACE_INCLUDE_ETH_INTERFACE_H
+#define COMPONENTS_NETWORK_INTERFACE_INCLUDE_ETH_INTERFACE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void eth_start(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // COMPONENTS_NETWORK_INTERFACE_INCLUDE_ETH_INTERFACE_H