Add virtio_rtc.h from the upstream Linux kernel using scripts/update-linux-headers.sh. Source: - Linux commit 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f (v7.0-rc1) - Author: Linus Torvalds <torvalds@linux-foundation.org> - Date: Sun Feb 22 13:18:59 2026 -0800 Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20260228182246.700714-2-visitorckw@gmail.com>