bonding: make tbl argument to bond_parse_parm() const

bond_parse_parm() parses a parameter table for a particular value and
is therefore not modifying the table at all.  Therefore make the 2nd
argument const, thus allowing to make the tables const later.

Signed-off-by: Holger Eitzenberger <holger@eitzenberger.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 19cd5c1..581fd17 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4723,7 +4723,7 @@
  * some mode names are substrings of other names, and calls from sysfs
  * may have whitespace in the name (trailing newlines, for example).
  */
-int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl)
+int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
 {
 	int mode = -1, i, rv;
 	char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };