wl12xx: fix compilation error when CONFIG_PM is not set

There was a compilation error when PM is not enabled:

  CC [M]  drivers/net/wireless/wl12xx/main.o
drivers/net/wireless/wl12xx/main.c:3653: error: unknown field 'suspend' specified in initializer
drivers/net/wireless/wl12xx/main.c:3653: warning: initialization from incompatible pointer type
drivers/net/wireless/wl12xx/main.c:3654: error: unknown field 'resume' specified in initializer
drivers/net/wireless/wl12xx/main.c:3654: warning: initialization from incompatible pointer type

Fix this by adding #ifdef's in the appropriate places.

Cc: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index 610be03..bc00e52 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -1350,6 +1350,7 @@
 	.notifier_call = wl1271_dev_notify,
 };
 
+#ifdef CONFIG_PM
 static int wl1271_configure_suspend(struct wl1271 *wl)
 {
 	int ret;
@@ -1493,6 +1494,7 @@
 
 	return 0;
 }
+#endif
 
 static int wl1271_op_start(struct ieee80211_hw *hw)
 {
@@ -3650,8 +3652,10 @@
 	.stop = wl1271_op_stop,
 	.add_interface = wl1271_op_add_interface,
 	.remove_interface = wl1271_op_remove_interface,
+#ifdef CONFIG_PM
 	.suspend = wl1271_op_suspend,
 	.resume = wl1271_op_resume,
+#endif
 	.config = wl1271_op_config,
 	.prepare_multicast = wl1271_op_prepare_multicast,
 	.configure_filter = wl1271_op_configure_filter,