[nrf fromtree] net: sockets: Split native IP socket implementation from syscalls

Native IP socket implementation need only be build if native IP stack is
enabled. Therefore, split the native IP sockets from the common socket
syscalls shared across all socket implementations.

Signed-off-by: Robert Lubos <[email protected]>
(cherry picked from commit 404e9c7)

Author: rlubos

subsys/net/lib/sockets/CMakeLists.txt

@@ -20,6 +20,7 @@ zephyr_library_sources(
   )
 endif()
 
+zephyr_library_sources_ifdef(CONFIG_NET_NATIVE                     sockets_inet.c)
 zephyr_library_sources_ifdef(CONFIG_NET_SOCKETS_CAN                sockets_can.c)
 zephyr_library_sources_ifdef(CONFIG_NET_SOCKETS_PACKET             sockets_packet.c)
 zephyr_library_sources_ifdef(CONFIG_NET_SOCKETS_SOCKOPT_TLS        sockets_tls.c)