Previously virt_addr_valid() was insufficient to validate if virt_to_page()
could be called on an address on arm64. This has since been fixed up so
there is no need for the extra check. Drop it.
Signed-off-by: NLaura Abbott <labbott@redhat.com>
Acked-by: NMark Rutland <mark.rutland@arm.com>
Signed-off-by: NKees Cook <keescook@chromium.org>