ACPI, APEI, Use apei_exec_run_optional in APEI EINJ and ERST

This patch changes APEI EINJ and ERST to use apei_exec_run for
mandatory actions, and apei_exec_run_optional for optional actions.

Cc: Thomas Renninger <trenn@novell.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index f74b2ea..ab821f1 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -285,7 +285,7 @@
 
 	einj_exec_ctx_init(&ctx);
 
-	rc = apei_exec_run(&ctx, ACPI_EINJ_BEGIN_OPERATION);
+	rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION);
 	if (rc)
 		return rc;
 	apei_exec_ctx_set_input(&ctx, type);
@@ -323,7 +323,7 @@
 	rc = __einj_error_trigger(trigger_paddr);
 	if (rc)
 		return rc;
-	rc = apei_exec_run(&ctx, ACPI_EINJ_END_OPERATION);
+	rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION);
 
 	return rc;
 }