The workaround has been removed. What stays is just code to find the
memory hole so the BATs can be configured properly in the function below.
Fixes: 57deb8fea0
("powerpc/wii: Don't rely on the reserved memory hack")
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>