ACPI: fix HP RX2600 IA64 boot

Copy space_id of GAS structure to newly created GAS.
The previous FADT conversion code defaulted to IO space.

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>