libertas: fix two memory leaks

The if_sdio_card structure was never being freed, and neither
was the command structure used for association.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 76caeba..e970897 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -1314,6 +1314,7 @@
 		kfree(packet);
 	}
 
+	kfree(card);
 	lbs_deb_leave(LBS_DEB_SDIO);
 }