tools: image: fix message when fail to add verification data for config

This function is called when signing configuration nodes.  Adjust
the error message.

I do not know why we do not need to show the error message in case of
ENOSPC.  Remove the if-conditional that seems unnecessary.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/tools/image-host.c b/tools/image-host.c
index d42c1ca..2c0030b 100644
--- a/tools/image-host.c
+++ b/tools/image-host.c
@@ -626,10 +626,8 @@
 	/* Write the public key into the supplied FDT file */
 	if (keydest) {
 		ret = info.crypto->add_verify_data(&info, keydest);
-		if (ret == -ENOSPC)
-			return -ENOSPC;
 		if (ret) {
-			printf("Failed to add verification data for '%s' signature node in '%s' image node\n",
+			printf("Failed to add verification data for '%s' signature node in '%s' configuration node\n",
 			       node_name, conf_name);
 		}
 		return ret;