efi_loader: use %zu to print efi_uintn_t in FMP driver

For printing an unsigned value we should use %u and not %d.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_loader/efi_firmware.c b/lib/efi_loader/efi_firmware.c
index 519a472..a5ff32f 100644
--- a/lib/efi_loader/efi_firmware.c
+++ b/lib/efi_loader/efi_firmware.c
@@ -302,7 +302,7 @@
 	efi_status_t (*progress)(efi_uintn_t completion),
 	u16 **abort_reason)
 {
-	EFI_ENTRY("%p %d %p %zd %p %p %p\n", this, image_index, image,
+	EFI_ENTRY("%p %d %p %zu %p %p %p\n", this, image_index, image,
 		  image_size, vendor_code, progress, abort_reason);
 
 	if (!image || image_index != 1)
@@ -417,7 +417,7 @@
 	efi_status_t status;
 	efi_uintn_t capsule_payload_size;
 
-	EFI_ENTRY("%p %d %p %zd %p %p %p\n", this, image_index, image,
+	EFI_ENTRY("%p %d %p %zu %p %p %p\n", this, image_index, image,
 		  image_size, vendor_code, progress, abort_reason);
 
 	if (!image)