net: midi2: Do not use poll from posix

As midi2 is provided by networking subsystem it should not
depend on any features provided by Posix. Convert Posix poll
API calls to zsock poll ones. There is no functionality changes,
only naming changes.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>

Author: jukkar

include/zephyr/net/midi2.h

@@ -31,7 +31,6 @@
 #include <stdint.h>
 #include <zephyr/audio/midi.h>
 #include <zephyr/net/socket.h>
-#include <zephyr/posix/poll.h>
 
 /**
  * Size, in bytes, of the nonce sent to the client for authentication
@@ -214,7 +213,7 @@ struct netmidi2_ep {
 		struct sockaddr_in6 addr6;
 	};
 	/** The listening socket wrapped in a poll descriptor */
-	struct pollfd pollsock;
+	struct zsock_pollfd pollsock;
 	/** The function to call when data is received from a client */
 	void (*rx_packet_cb)(struct netmidi2_session *session,
 			     const struct midi_ump ump);

subsys/net/lib/midi2/netmidi2.c

@@ -714,7 +714,7 @@ static void netmidi2_service_handler(struct net_socket_service_event *pev)
 {
 	int ret;
 	struct netmidi2_ep *ep = pev->user_data;
-	struct pollfd *pfd = &pev->event;
+	struct zsock_pollfd *pfd = &pev->event;
 	struct sockaddr peer_addr;
 	socklen_t peer_addr_len = sizeof(peer_addr);
 	struct net_buf *rxbuf;
@@ -798,7 +798,7 @@ int netmidi2_host_ep_start(struct netmidi2_ep *ep)
 	}
 
 	ep->pollsock.fd = sock;
-	ep->pollsock.events = POLLIN;
+	ep->pollsock.events = ZSOCK_POLLIN;
 	ret = net_socket_service_register(&netmidi2_service, &ep->pollsock, 1, ep);
 	if (ret < 0) {
 		zsock_close(sock);