net/ipv6/mcast.c: Remove unnecessary kmalloc casts

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/mcast.c

@@ -1995,8 +1995,7 @@ static int sf_setstate(struct ifmcaddr6 *pmc)
 				    &psf->sf_addr))
 					break;
 			if (!dpsf) {
-				dpsf = (struct ip6_sf_list *)
-					kmalloc(sizeof(*dpsf), GFP_ATOMIC);
+				dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
 				if (!dpsf)
 					continue;
 				*dpsf = *psf;