remoteproc: k3-r5: Use IO memset to clear TCMs

While it should be safe to use normal memset() on these memories as they
are mapped as Normal Non-Cached, using the memset_io() provides stronger
guarantees on access alignment and fixes a sparse check warning. Switch
to memset_io() here.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241021204557.929823-1-afd@ti.com


Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>