efi_loader: use %zu not %zd to print efi_uintn_t

efi_uintnt_t is an unsigned type. We should avoid showing negative numbers.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 1ea04de..82128ac 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -467,7 +467,7 @@
 {
 	efi_status_t r;
 
-	EFI_ENTRY("%d, %zd, %p", pool_type, size, buffer);
+	EFI_ENTRY("%d, %zu, %p", pool_type, size, buffer);
 	r = efi_allocate_pool(pool_type, size, buffer);
 	return EFI_EXIT(r);
 }
@@ -914,7 +914,7 @@
 {
 	int i;
 
-	EFI_ENTRY("%zd, %p, %p", num_events, event, index);
+	EFI_ENTRY("%zu, %p, %p", num_events, event, index);
 
 	/* Check parameters */
 	if (!num_events || !event)
@@ -2028,7 +2028,7 @@
 	efi_status_t ret;
 	void *dest_buffer;
 
-	EFI_ENTRY("%d, %p, %pD, %p, %zd, %p", boot_policy, parent_image,
+	EFI_ENTRY("%d, %p, %pD, %p, %zu, %p", boot_policy, parent_image,
 		  file_path, source_buffer, source_size, image_handle);
 
 	if (!image_handle || (!source_buffer && !file_path) ||