efi_loader: rename efi_bootmgr_image_return_notify

We use this event when returning from an EFI HTTP booted image.
The name is a bit confusing since it suggests we always run it,
rename it to make it clearer

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c
index 181fc87..03cdee1 100644
--- a/lib/efi_loader/efi_bootmgr.c
+++ b/lib/efi_loader/efi_bootmgr.c
@@ -421,13 +421,13 @@
 }
 
 /**
- * efi_bootmgr_image_return_notify() - return to efibootmgr callback
+ * efi_bootmgr_http_return() - return to efibootmgr callback
  *
  * @event:	the event for which this notification function is registered
  * @context:	event context
  */
-static void EFIAPI efi_bootmgr_image_return_notify(struct efi_event *event,
-						   void *context)
+static void EFIAPI efi_bootmgr_http_return(struct efi_event *event,
+					   void *context)
 {
 	efi_status_t ret;
 
@@ -533,7 +533,7 @@
 
 	/* create event for cleanup when the image returns or error occurs */
 	ret = efi_create_event(EVT_NOTIFY_SIGNAL, TPL_CALLBACK,
-			       efi_bootmgr_image_return_notify, ctx,
+			       efi_bootmgr_http_return, ctx,
 			       &efi_guid_event_group_return_to_efibootmgr,
 			       &event);
 	if (ret != EFI_SUCCESS) {