remoteproc: k3-r5: Use devm_ioremap_wc() helper

Use a device lifecycle managed ioremap helper function. This helps
prevent mistakes like unmapping out of order in cleanup functions and
forgetting to unmap on all error paths.

Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241219110545.1898883-4-b-padhi@ti.com


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