[ACPI] ia64 build fix

arch/ia64/kernel/acpi-ext.c: In function `acpi_vendor_resource_match':
arch/ia64/kernel/acpi-ext.c:38: error: structure has no member named `id'

Signed-off-by: MAEDA Naoaki <maeda.naoaki@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>