crypto: lzo - use kvfree() helper

kvfree() helper is now available, use it instead of open code it.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/lzo.c

@@ -45,10 +45,7 @@ static void lzo_exit(struct crypto_tfm *tfm)
 {
 	struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
 
-	if (is_vmalloc_addr(ctx->lzo_comp_mem))
-		vfree(ctx->lzo_comp_mem);
-	else
-		kfree(ctx->lzo_comp_mem);
+	kvfree(ctx->lzo_comp_mem);
 }
 
 static int lzo_compress(struct crypto_tfm *tfm, const u8 *src,