remoteproc: k3-r5: Add compile testing support

This driver can be compile tested on non-K3 architectures as long
as TI_SCI_PROTOCOL is not compiled as a module. Enable this here
to improve this driver's build coverage.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241016164141.93401-3-afd@ti.com


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