sw64: unify 32-bit MEMIO address of host and guest

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56WV8



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When passing through device, 32-bit MEMIO address of guest os is
between 3G and 3.5G, and it may produce dma address beyond 3.5G,
which is considered to be MEMIO address of host and cause DMA to
to fail. To fix it, 32-bit MEMEIO address of guest os should keep
consistent with host.

Signed-off-by: Lu Feifei <lufeifei@wxiat.com>

Signed-off-by: Gu Zitao <guzitao@wxiat.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>