net/iavf: fix build with clang 21

Fix the following error seen with clang 21.1.4

drivers/net/intel/iavf/iavf_vchnl.c:123:38: error: variable
'notify_byte' is uninitialized when passed as a const pointer
argument here [-Werror,-Wuninitialized-const-pointer]

Fixes: cb5c1b9 ("net/iavf: add thread for event callbacks")
Cc: [email protected]

Signed-off-by: Jerin Jacob <[email protected]>
Acked-by: Vladimir Medvedkin <[email protected]>
Reviewed-by: David Marchand <[email protected]>

Author: Jerin Jacob

drivers/net/intel/iavf/iavf_vchnl.c

@@ -102,7 +102,7 @@ iavf_dev_event_post(struct rte_eth_dev *dev,
 		void *param, size_t param_alloc_size)
 {
 	struct iavf_event_handler *handler = &event_handler;
-	char notify_byte;
+	char notify_byte = 0;
 	struct iavf_event_element *elem = rte_malloc(NULL, sizeof(*elem) + param_alloc_size, 0);
 	if (!elem)
 		return;