bnx2[x]: Make module parameters readable

Occasionally users want to know what parameters their Broadcom drivers
are running with. For example, a user may want to know if MSI is
disabled.

This patch has been compile tested.

Signed-off-by: James M Leddy <james.leddy@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index 9d2deda..cda25ac 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -85,7 +85,7 @@
 
 static int disable_msi = 0;
 
-module_param(disable_msi, int, 0);
+module_param(disable_msi, int, S_IRUGO);
 MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)");
 
 typedef enum {