ch-release-v6.16.9-20260324

arch: Enable virtio-rtc configs for x86,arm64

The virtio-rtc driver is available in 6.16. Enable it to support
an emulated PTP device.

Required:
CONFIG_PTP_1588_CLOCK=y, CONFIG_VIRTIO_RTC=y, CONFIG_VIRTIO_RTC_PTP=y