tools: mkimage: add support for Vybrid image format

This format can be flashed directly at address 0 of
the NAND FLASH, as it contains all necessary headers.

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
diff --git a/tools/Makefile b/tools/Makefile
index 421414b..e6f7993 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -89,6 +89,7 @@
 			os_support.o \
 			pblimage.o \
 			pbl_crc32.o \
+			vybridimage.o \
 			$(ROCKCHIP_OBS) \
 			socfpgaimage.o \
 			lib/sha1.o \