hw/acpi: Move CPU ctrl-dev MMIO region len macro to common header file

CPU ctrl-dev MMIO region length could be used in ACPI GED and various other
architecture specific places. Move ACPI_CPU_HOTPLUG_REG_LEN macro to more
appropriate common header file.

Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
Tested-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com>
Tested-by: Xianglai Li <lixianglai@loongson.cn>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
Tested-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20240716111502.202344-3-salil.mehta@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/acpi/cpu.c

@@ -7,7 +7,6 @@
 #include "trace.h"
 #include "sysemu/numa.h"
 
-#define ACPI_CPU_HOTPLUG_REG_LEN 12
 #define ACPI_CPU_SELECTOR_OFFSET_WR 0
 #define ACPI_CPU_FLAGS_OFFSET_RW 4
 #define ACPI_CPU_CMD_OFFSET_WR 5

include/hw/acpi/cpu.h

@@ -19,6 +19,8 @@
 #include "hw/boards.h"
 #include "hw/hotplug.h"
 
+#define ACPI_CPU_HOTPLUG_REG_LEN 12
+
 typedef struct AcpiCpuStatus {
     CPUState *cpu;
     uint64_t arch_id;