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>
diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
index 768f957..a0a9c2a 100644
--- a/drivers/pcmcia/soc_common.c
+++ b/drivers/pcmcia/soc_common.c
@@ -186,8 +186,8 @@
 	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 @@
 
 	debug(skt, 2, "suspending socket\n");
 
-	skt->ops->socket_suspend(skt);
+	if (skt->ops->socket_suspend)
+		skt->ops->socket_suspend(skt);
 
 	return 0;
 }