ANDROID: arm64: ioremap/iounmap use range for MMIO guard hypercalls

The hypervisor can accept a range for the mmio guard hypercall. This
intends to reduce back and forth between with the hypervisor.

The feature is advertised via the KVM_FUNC_HAS_RANGE flag from the
MEM_INFO HVC.

Bug: 278749606
Bug: 243642516
Change-Id: I0f7d88db376c412812059d1c13ba8197777f16d5
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>