[PATCH net-next] net: ieee802154: Fix compilation error when CONFIG_IEEE802154_NL802154_EXPERIMENTAL is disabled

[Gal Pressman <gal@nvidia.com>]

When CONFIG_IEEE802154_NL802154_EXPERIMENTAL is disabled,
NL802154_CMD_DEL_SEC_LEVEL is undefined and results in a compilation
error:
net/ieee802154/nl802154.c:2503:19: error: 'NL802154_CMD_DEL_SEC_LEVEL' undeclared here (not in a function); did you mean 'NL802154_CMD_SET_CCA_ED_LEVEL'?
 2503 |  .resv_start_op = NL802154_CMD_DEL_SEC_LEVEL + 1,
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                   NL802154_CMD_SET_CCA_ED_LEVEL

Use __NL802154_CMD_AFTER_LAST instead of
'NL802154_CMD_DEL_SEC_LEVEL + 1' to indicate the last command.

Fixes: 9c5d03d36251 ("genetlink: start to validate reserved header bytes")
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Gal Pressman <gal@nvidia.com>
---
 net/ieee802154/nl802154.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 38c4f3cb010e..dbfd24c70bd0 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -2500,7 +2500,7 @@ static struct genl_family nl802154_fam __ro_after_init = {
 	.module = THIS_MODULE,
 	.ops = nl802154_ops,
 	.n_ops = ARRAY_SIZE(nl802154_ops),
-	.resv_start_op = NL802154_CMD_DEL_SEC_LEVEL + 1,
+	.resv_start_op = __NL802154_CMD_AFTER_LAST,
 	.mcgrps = nl802154_mcgrps,
 	.n_mcgrps = ARRAY_SIZE(nl802154_mcgrps),
 };
-- 
2.25.1