cpus=1 busratio=20 has a very easy DSDT fix.
If you don't want to mess with DSDT, you can use mine or use DSDTSE. All you have to do is transform Scope (_PR) into something like this:
Scope (_PR)
{
Processor (P001, 0x01, 0x00000810, 0x06) {}
Processor (P002, 0x02, 0x00000000, 0x00) {}
Processor (P003, 0x03, 0x00000000, 0x00) {}
Processor (P004, 0x04, 0x00000000, 0x00) {}
Processor (P005, 0x05, 0x00000000, 0x00) {}
Processor (P006, 0x06, 0x00000000, 0x00) {}
Processor (P007, 0x07, 0x00000000, 0x00) {}
Processor (P008, 0x08, 0x00000000, 0x00) {}
}
All you have to do is delete all the lines that start with "Alias" in that section.
Ex: "Alias (P002, CPU2)"
If there are other lines:
Processor (P010, 0x0A, 0x00000000, 0x00) {}
Processor (P011, 0x0B, 0x00000000, 0x00) {}
Processor (P012, 0x0C, 0x00000000, 0x00) {}
Processor (P013, 0x0D, 0x00000000, 0x00) {}
Processor (P014, 0x0E, 0x00000000, 0x00) {}
Processor (P015, 0x0F, 0x00000000, 0x00) {}
Processor (P016, 0x10, 0x00000000, 0x00) {}
Leave them there. If you want to delete them, it should be harmless but I'd leave it like this: