Please check the patch.
Add option CONFIG_VAR_MTRR_HOLE to enable hole in mtrr by subtracting.
Did that, does nothing. I added the option=1 but wasn't sure it was making it into mtrr.c, so I also hard-set it there to 1 and 0 and none of those three tries affected the MTRR errors at driver load nor the contents of /proc/mtrr.
-mcq