powerpc: Revert Load Monitor Register Support

Load monitored is no longer supported on POWER9 so let's remove the
code.

This reverts commit bd3ea317fddf ("powerpc: Load Monitor Register
Support").

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
4 files changed