ieee802154: hwsim: remove redundant initialization of variable res

The variable res is being initialized with a value that is
never read and it is being updated later with a new value.
The initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ieee802154/mac802154_hwsim.c

@@ -268,7 +268,7 @@ static int hwsim_get_radio(struct sk_buff *skb, struct hwsim_phy *phy,
 			   struct netlink_callback *cb, int flags)
 {
 	void *hdr;
-	int res = -EMSGSIZE;
+	int res;
 
 	hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
 			  MAC802154_HWSIM_CMD_GET_RADIO);