v307 ethernet demo fuse change

[cnlohr]

try this:

 # memory split 0.
-#optionbytes.dat :
-#      @/bin/echo -ne "\xa5\xa5\x3f\xc0\xff\x00\xff\x00\xff\x00\xff\x00\xff\x00\xff\x00" > optionbytes.dat
-#
-#optionwrite : optionbytes.dat
-#      $(MINICHLINK)/minichlink -w optionbytes.dat option
+optionbytes.dat :
+       @/bin/echo -ne "\xa5\x5a\xdf\x20\xff\x00\xff\x00\xff\x00\xff\x00\xff\x00\xff\x00" > optionbytes.dat
+
+optionwrite : optionbytes.dat
+       $(MINICHLINK)/minichlink -w optionbytes.dat option

And, also, move up the memory split code.