ACPICA: Debugger: Fix "terminate" command by cleaning up subsystem shutdown logic

ACPICA commit 7e823714911480be47e310fb1b3590d289b9fd99

Segmentation fault can be seen for executing the "terminate" command. This
is because acpi_ut_subsystem_shutdown() is errnously called multiple times.

This patch cleans up acpi_ut_subsystem_shutdown() logics to fix this
issue. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/7e823714
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpica/dbinput.c

@@ -1074,6 +1074,7 @@ acpi_db_command_dispatch(char *input_buffer,
 		 * re-creating the semaphores!
 		 */
 
+		acpi_gbl_db_terminate_loop = TRUE;
 		/*  acpi_initialize (NULL); */
 		break;
 
@@ -1151,7 +1152,7 @@ void ACPI_SYSTEM_XFACE acpi_db_execute_thread(void *context)
 	acpi_status status = AE_OK;
 	acpi_status Mstatus;
 
-	while (status != AE_CTRL_TERMINATE) {
+	while (status != AE_CTRL_TERMINATE && !acpi_gbl_db_terminate_loop) {
 		acpi_gbl_method_executing = FALSE;
 		acpi_gbl_step_to_next_call = FALSE;