Beautify flash chip ID verbose printout a little, always use %02x

Corresponding to flashrom svn r390 and coreboot v2 svn r3895.

Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Peter Stuge <peter@stuge.se>
diff --git a/spi.c b/spi.c
index b31a6b8..8a7b79f 100644
--- a/spi.c
+++ b/spi.c
@@ -126,7 +126,7 @@
 		model_id = (readarr[1] << 8) | readarr[2];
 	}
 
-	printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, manuf_id,
+	printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, manuf_id,
 		     model_id);
 
 	if (manuf_id == flash->manufacture_id && model_id == flash->model_id) {