remoteproc: k3: Refactor mem_release() functions into common driver

The mem_release() implementations in the TI K3 R5, DSP and M4 remoteproc
drivers release the reserved memory of the device, which get auto
triggered upon device removal.

Refactor these functions into ti_k3_common.c driver as k3_mem_release()
and use this common function in R5, DSP and M4 drivers.

Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Tested-by: Judith Mendez <jm@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20250513054510.3439842-35-b-padhi@ti.com


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