xfrm/compat: Don't allocate memory with __GFP_ZERO

32-bit to 64-bit messages translator zerofies needed paddings in the
translation, the rest is the actual payload.
Don't allocate zero pages as they are not needed.

Fixes: 5106f4a8 ("xfrm/compat: Add 32=>64-bit messages translator")
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

net/xfrm/xfrm_compat.c

@@ -564,7 +564,7 @@ static struct nlmsghdr *xfrm_user_rcv_msg_compat(const struct nlmsghdr *h32,
 		return NULL;
 
 	len += NLMSG_HDRLEN;
-	h64 = kvmalloc(len, GFP_KERNEL | __GFP_ZERO);
+	h64 = kvmalloc(len, GFP_KERNEL);
 	if (!h64)
 		return ERR_PTR(-ENOMEM);