PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe: rename LibRtcVirtualNotifyEvent

PcatRealTimeClockRuntimeDxe seems to have copied the interface name
LibRtcVirtualNotifyEvent() from EmbeddedPkg's RealTimeClockLib class.
That's not right, for two reasons:

- PcatRealTimeClockRuntimeDxe doesn't consume "EmbeddedPkg.dec" in the
  first place,

- in EmbeddedPkg, the RealTimeClockLib class API
  LibRtcVirtualNotifyEvent() is about to be eliminated (it's a bogus API).

Rename the LibRtcVirtualNotifyEvent() function to VirtualNotifyEvent(),
and make it static.

Tested with booting OVMF.

Cc: Ray Ni <ray.ni@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=4564
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20231012091057.108728-2-lersek@redhat.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Tested-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>

PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtcEntry.c

@@ -122,9 +122,10 @@ PcRtcEfiSetWakeupTime (
   @param[in]    Event   The Event that is being processed
   @param[in]    Context Event Context
 **/
+STATIC
 VOID
 EFIAPI
-LibRtcVirtualNotifyEvent (
+VirtualNotifyEvent (
   IN EFI_EVENT  Event,
   IN VOID       *Context
   )
@@ -220,7 +221,7 @@ InitializePcRtc (
     Status = gBS->CreateEventEx (
                     EVT_NOTIFY_SIGNAL,
                     TPL_NOTIFY,
-                    LibRtcVirtualNotifyEvent,
+                    VirtualNotifyEvent,
                     NULL,
                     &gEfiEventVirtualAddressChangeGuid,
                     &mVirtualAddrChangeEvent