mkimage: adding support for Davinci AIS image

Some Davinci processors supports the Application
Image Script (AIS) boot process. The patch adds the generation
of the AIS image inside the mkimage tool to make possible
to generate a bootable U-boot without external tools
(TI Davinci AIS Generator).

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Wolfgang Denk <wd@denx.de>
diff --git a/include/image.h b/include/image.h
index 56b8b93..1ba866e 100644
--- a/include/image.h
+++ b/include/image.h
@@ -161,6 +161,7 @@
 #define IH_TYPE_IMXIMAGE	10	/* Freescale IMXBoot Image	*/
 #define IH_TYPE_UBLIMAGE	11	/* Davinci UBL Image		*/
 #define IH_TYPE_OMAPIMAGE	12	/* TI OMAP Config Header Image	*/
+#define IH_TYPE_AISIMAGE	13	/* TI Davinci AIS Image		*/
 
 /*
  * Compression Types