[NET]: Remove more unneeded typecasts on *malloc()

This removes more unneeded casts on the return value for kmalloc(),
sock_kmalloc(), and vmalloc().

Signed-off-by: Kris Katterjohn <kjak@users.sourceforge.net>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 8c77560..9ac1b8c2 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -94,7 +94,7 @@
 	struct rpc_cred_cache *new;
 	int i;
 
-	new = (struct rpc_cred_cache *)kmalloc(sizeof(*new), GFP_KERNEL);
+	new = kmalloc(sizeof(*new), GFP_KERNEL);
 	if (!new)
 		return -ENOMEM;
 	for (i = 0; i < RPC_CREDCACHE_NR; i++)