kwbimage: align v1 binary header to 4B

According to the Armada-XP documentation the binary header format
requires the header length to be aligned to 4B.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>

tools/kwbimage.c

@@ -498,6 +498,7 @@ static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
 		binhdrsz = sizeof(struct opt_hdr_v1) +
 			(binarye->binary.nargs + 1) * sizeof(unsigned int) +
 			s.st_size;
+		binhdrsz = ALIGN_SUP(binhdrsz, 32);
 		hdr->headersz_lsb = binhdrsz & 0xFFFF;
 		hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;