mor1kx: sync

diff --git a/verilog/mor1kx/submodule b/verilog/mor1kx/submodule
index ccdb61379193b1933036f3162deb8cf252c52390..64651c8af488a498f059c54fcd9580b1d16ac6c4 160000 (submodule)
--- a/verilog/mor1kx/submodule
+++ b/verilog/mor1kx/submodule
@@ -1 +1 @@
-Subproject commit ccdb61379193b1933036f3162deb8cf252c52390
+Subproject commit 64651c8af488a498f059c54fcd9580b1d16ac6c4