efi_loader: use correct types in EFI_FILE_PROTOCOL

In the EFI_FILE_PROTOCOL buffer sizes and positions are passed as UINTN and
not as u64.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index d15a131..7a9449f 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1513,7 +1513,7 @@
 	struct efi_file_info *info = NULL;
 	struct efi_file_handle *f;
 	static efi_status_t ret;
-	uint64_t bs;
+	efi_uintn_t bs;
 
 	f = efi_file_from_path(file_path);
 	if (!f)
@@ -1534,7 +1534,8 @@
 	if (ret)
 		goto error;
 
-	EFI_CALL(ret = f->read(f, &info->file_size, *buffer));
+	bs = info->file_size;
+	EFI_CALL(ret = f->read(f, &bs, *buffer));
 
 error:
 	free(info);