efi_loader: mark started images

In UnloadImage() we need to know if an image is already started.

Add a field to the handle structure identifying loaded and started images.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 7af3f16..3b50cd2 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -180,6 +180,18 @@
 };
 
 /**
+ * enum efi_object_type - type of EFI object
+ *
+ * In UnloadImage we must be able to identify if the handle relates to a
+ * started image.
+ */
+enum efi_object_type {
+	EFI_OBJECT_TYPE_UNDEFINED = 0,
+	EFI_OBJECT_TYPE_LOADED_IMAGE,
+	EFI_OBJECT_TYPE_STARTED_IMAGE,
+};
+
+/**
  * struct efi_object - dereferenced EFI handle
  *
  * @link:	pointers to put the handle into a linked list
@@ -201,6 +213,7 @@
 	struct list_head link;
 	/* The list of protocols */
 	struct list_head protocols;
+	enum efi_object_type type;
 };
 
 /**