The D-cache on AArch64 is VIPT non-aliasing, so there is no need to
flush it for anonymous pages.
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Reported-by: NWill Deacon <will.deacon@arm.com>
Acked-by: NWill Deacon <will.deacon@arm.com>