drivers:pcmcia:soc_common: make socket_init and socket_suspend optional

10 boards define these empty, probably indicating not everyone has a use for them.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/pcmcia/soc_common.c

@@ -186,8 +186,8 @@ static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock)
 	struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
 
 	debug(skt, 2, "initializing socket\n");
-
-	skt->ops->socket_init(skt);
+	if (skt->ops->socket_init)
+		skt->ops->socket_init(skt);
 	return 0;
 }
 
@@ -207,7 +207,8 @@ static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock)
 
 	debug(skt, 2, "suspending socket\n");
 
-	skt->ops->socket_suspend(skt);
+	if (skt->ops->socket_suspend)
+		skt->ops->socket_suspend(skt);
 
 	return 0;
 }