UPSTREAM: arm64: Implement ioremap_np() to map MMIO as nGnRnE

This is used on Apple ARM platforms, which require most MMIO
(except PCI devices) to be mapped as nGnRnE.

Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>

Bug: 246683188
(cherry picked from commit 9a63ae85)
Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
Change-Id: I6b2210f9f225d573a1fbe9563bc8a5ea56e24f86