ArmVirtPkg: Package dependency for MC146818 RTC

ArmVirtPkg: Package dependency for MC146818 RTC

Kvmtool emulates a MC146818 RTC controller in the
MMIO space. To support this the MC146818 RTC driver
PcatRealTimeClockRuntimeDxe has been updated to
support MMIO accesses. PCDs for RTC Index and
Target register base addresses in the MMIO space
have been introduced. The KvmtoolRtcFdtClientLib
reads the MC146818 RTC MMIO base address region
from the Kvmtool device tree and updates the
Index and Target register PCDs.

As these PCDs are defined in PcAtChipsetPkg.dec,
this patch updates the CI script to add this
dependency.

Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Acked-by: Ard Biesheuvel <Ard.Biesheuvel@arm.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>