netfilter: nf_tables: rename nft_validate_data_load()

The existing name is ambiguous, data is loaded as well when we read from
a register. Rename to nft_validate_register_store() for clarity and
consistency with the upcoming patch to introduce its counterpart,
nft_validate_register_load().

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c
index ce368de..e23ddb6 100644
--- a/net/netfilter/nft_ct.c
+++ b/net/netfilter/nft_ct.c
@@ -311,8 +311,8 @@
 	if (err < 0)
 		return err;
 
-	err = nft_validate_data_load(ctx, priv->dreg, NULL,
-				     NFT_DATA_VALUE, len);
+	err = nft_validate_register_store(ctx, priv->dreg, NULL,
+					  NFT_DATA_VALUE, len);
 	if (err < 0)
 		return err;