cbfstool: Fix checkpatch error

ERROR: code indent should use tabs where possible
+^I                trampoline_len);$

Change-Id: If46f977e2e07d73e6cfd3038912a172236a7e571
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/12620
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

util/cbfstool/cbfs-payload-linux.c

@@ -98,7 +98,7 @@ static void bzp_add_segment(struct bzpayload *bzp, struct buffer *b, void *data,
 static int bzp_add_trampoline(struct bzpayload *bzp)
 {
 	bzp_add_segment(bzp, &bzp->trampoline, trampoline,
-	                trampoline_len);
+			trampoline_len);
 	return 0;
 }