prism54: bug in getting auth type

There is a missing break statement so SHARED_KEY authentication doesn't
work.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
index 4e44b1a..1c22b81 100644
--- a/drivers/net/wireless/prism54/isl_ioctl.c
+++ b/drivers/net/wireless/prism54/isl_ioctl.c
@@ -1503,6 +1503,7 @@
 			case DOT11_AUTH_BOTH:
 			case DOT11_AUTH_SK:
 				param->value = IW_AUTH_ALG_SHARED_KEY;
+				break;
 			case DOT11_AUTH_NONE:
 			default:
 				param->value = 0;