Summary: - In arp_wait_setup() and arp_wait_cancel(), g_arp_waiters is protected by a critical section. - However, I noticed that arp_notify() does not protect the g_arp_waiters that would cause memory corruption - This commit fixes the issue. Impact: - None Testing: - Tested with spresense:rndis_smp, spresense:rndis Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>