[ATM]: atm_pcr_goal() doesn't modify its argument's contents -- mark it as const

Signed-off-by: Mitchell Blank Jr <mitch@sfgoth.com>
Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index e7d0593..37e5ee4 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -468,7 +468,7 @@
 int atm_charge(struct atm_vcc *vcc,int truesize);
 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
     gfp_t gfp_flags);
-int atm_pcr_goal(struct atm_trafprm *tp);
+int atm_pcr_goal(const struct atm_trafprm *tp);
 
 void vcc_release_async(struct atm_vcc *vcc, int reply);