ppp: make channel_ops const

The PPP channel ops structure should be const.
Cleanup the declarations to use standard C99 format.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/atm/pppoatm.c

@@ -260,7 +260,7 @@ static int pppoatm_devppp_ioctl(struct ppp_channel *chan, unsigned int cmd,
 	return -ENOTTY;
 }
 
-static /*const*/ struct ppp_channel_ops pppoatm_ops = {
+static const struct ppp_channel_ops pppoatm_ops = {
 	.start_xmit = pppoatm_send,
 	.ioctl = pppoatm_devppp_ioctl,
 };