tools: kwbimage: Explicitly set version also for kwbimage v0

For documentation purposes update struct main_hdr_v0 to include information
where version of the image must be stored. For kwbimage v0 it obviously
must be 0. By default all image header memory is initialized to zero,
therefore this change has no functional effect.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/tools/kwbimage.h b/tools/kwbimage.h
index f1ba95c..f74767e 100644
--- a/tools/kwbimage.h
+++ b/tools/kwbimage.h
@@ -42,7 +42,8 @@
 	uint8_t  nandeccmode;		/* 0x1       */
 	uint16_t nandpagesize;		/* 0x2-0x3   */
 	uint32_t blocksize;		/* 0x4-0x7   */
-	uint32_t rsvd1;			/* 0x8-0xB   */
+	uint8_t  version;		/* 0x8       */
+	uint8_t  rsvd1[3];		/* 0x9-0xB   */
 	uint32_t srcaddr;		/* 0xC-0xF   */
 	uint32_t destaddr;		/* 0x10-0x13 */
 	uint32_t execaddr;		/* 0x14-0x17 */