ArmPkg/CpuDxe: remove VirtualUncachedPages protocol and implementation

Virtual uncached pages are simply pages that are aliased using mismatched
attributes, which is not allowed by the ARM architecture. So remove the
protocol and its implementation.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

ArmPkg/Drivers/CpuDxe/CpuDxe.c

@@ -253,7 +253,6 @@ CpuDxeInitialize (
   Status = gBS->InstallMultipleProtocolInterfaces (
                 &mCpuHandle,
                 &gEfiCpuArchProtocolGuid,           &mCpu,
-                &gVirtualUncachedPagesProtocolGuid, &gVirtualUncachedPages,
                 NULL
                 );