hw/arm/acpi: enable SHPC native hot plug

hw/arm/acpi: enable SHPC native hot plug

After the introduction of generic PCIe root port and PCIe-PCI bridge,
we will also have SHPC controller on ARM, so just enable SHPC native
hot plug.

Also update tests/data/acpi/virt/DSDT* to pass "make check".

Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Message-id: 20191209063719.23086-3-guoheyi@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>