Fix a few printf argument verification warnings

The parameters of size_t type shall be formatted using "%zu" and not
using "%d".

Precision argument for the "%.*s" parameters shall be of int type.

Signed-off-by: Vasili Galka <vvv444@gmail.com>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 774fdad..b16664f 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -86,7 +86,7 @@
 		spl_image.os = image_get_os(header);
 		spl_image.name = image_get_name(header);
 		debug("spl: payload image: %.*s load addr: 0x%x size: %d\n",
-			sizeof(spl_image.name), spl_image.name,
+			(int)sizeof(spl_image.name), spl_image.name,
 			spl_image.load_addr, spl_image.size);
 	} else {
 		/* Signature not found - assume u-boot.bin */