rose: constify dev_addr passing

In preparation for netdev->dev_addr being constant
make all relevant arguments in rose constant.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index cf7d974..30a1cf4 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -109,7 +109,7 @@ char *rose2asc(char *buf, const rose_address *addr)
 /*
  *	Compare two ROSE addresses, 0 == equal.
  */
-int rosecmp(rose_address *addr1, rose_address *addr2)
+int rosecmp(const rose_address *addr1, const rose_address *addr2)
 {
 	int i;
 
@@ -123,7 +123,8 @@ int rosecmp(rose_address *addr1, rose_address *addr2)
 /*
  *	Compare two ROSE addresses for only mask digits, 0 == equal.
  */
-int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
+int rosecmpm(const rose_address *addr1, const rose_address *addr2,
+	     unsigned short mask)
 {
 	unsigned int i, j;