staging/ozwpan: Mark read only parameters and structs as const

This patch marks function parameters that are used read only
as well as readonly structs (and corresponding pointers) as const.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/ozwpan/ozproto.c b/drivers/staging/ozwpan/ozproto.c
index 40c283c..3badf15 100644
--- a/drivers/staging/ozwpan/ozproto.c
+++ b/drivers/staging/ozwpan/ozproto.c
@@ -171,7 +171,7 @@
  * Context: softirq-serialized
  */
 static struct oz_pd *oz_connect_req(struct oz_pd *cur_pd, struct oz_elt *elt,
-			u8 *pd_addr, struct net_device *net_dev)
+			const u8 *pd_addr, struct net_device *net_dev)
 {
 	struct oz_pd *pd;
 	struct oz_elt_connect_req *body =
@@ -306,7 +306,7 @@
  * Context: softirq-serialized
  */
 static void oz_add_farewell(struct oz_pd *pd, u8 ep_num, u8 index,
-			u8 *report, u8 len)
+			const u8 *report, u8 len)
 {
 	struct oz_farewell *f;
 	struct oz_farewell *f2;
@@ -734,7 +734,7 @@
 /*------------------------------------------------------------------------------
  * Context: softirq or process
  */
-struct oz_pd *oz_pd_find(u8 *mac_addr)
+struct oz_pd *oz_pd_find(const u8 *mac_addr)
 {
 	struct oz_pd *pd;
 	struct list_head *e;