KVM: arm64: Remove the creation time's mapping of MMIO regions

mainline inclusion
from mainline-v5.14-rc1
commit fd6f17ba
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5R1MW
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd6f17bade21



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The MMIO regions may be unmapped for many reasons and can be remapped
by stage2 fault path. Map MMIO regions at creation time becomes a
minor optimization and makes these two mapping path hard to sync.

Remove the mapping code while keep the useful sanity check.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Heng Zhang <zhangheng191@h-partners.com>
Reviewed-by: Keqian Zhu <zhukeqian1@huawei.com>
Link: https://lore.kernel.org/r/20210507110322.23348-2-zhukeqian1@huawei.com


Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>