mxssb: Fix the HAB flag

Properly set the HAB flag to a #define'd value instead of a hardcoded
value.
Signed-off-by: Marek Vasut <marex@denx.de>

mxssb.c

@@ -590,7 +590,7 @@ static int sb_tag_to_command(struct sb_cmd_ctx *cctx, char *line)
 			return -EINVAL;
 		/* Check for "HAB" flag. */
 		if ((strlen(tok) == 3) && !strncmp(tok, "HAB", 3)) {
-			cmd->header.flags = 1;	// HACK
+			cmd->header.flags = ROM_CALL_CMD_FLAG_HAB;
 			tok = strtok(NULL, " ");
 			if (!tok)
 				return -EINVAL;