efi_loader: LoadImage: always allocate new pages

If we want to properly unload images in Exit() the memory should always be
allocated in the same way. As we allocate memory when reading from file we
should do the same when the original image is in memory.

A further patch will be needed to free the memory when Exit() is called.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

include/efi_loader.h

@@ -397,7 +397,7 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
 				    struct efi_loaded_image_obj **handle_ptr,
 				    struct efi_loaded_image **info_ptr);
 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
-				      void **buffer);
+				      void **buffer, efi_uintn_t *size);
 /* Print information about all loaded images */
 void efi_print_image_infos(void *pc);