[PATCH] opcodes: constify & scope microblaze opcodes

[Nick Clifton]

Hi Mike,

> This is exporting the variable "opcodes" as a large writable blob.
> This is not a namespace friendly name, so add a "microblaze" prefix,
> and then sprinkle const over its definition & use.

Approved - please apply - with ChangeLogs...

Cheers
   Nick