coresight: cti: Move resource release to cti_remove()

coresight: cti: Move resource release to cti_remove()

Currently, CTI driver releases resource by deferring
cti_device_release() to the device unregistration:

  cti_remove()
   `> coresight_unregister()
       `> cti_remove_assoc_from_csdev()
       `> device_unregister()
           `> cti_device_release()
               `> mutex_lock(&ect_mutex)
               `> release CTI resource
               `> mutex_unlock(&ect_mutex)

In the above flow, two different CTI release callbacks are involved:
cti_remove_assoc_from_csdev() and cti_device_release().  The former is
used by a CoreSight device to unbind its associated CTI helper device,
while the latter releases resources for the CTI device itself.  Since
there is no dependency between them, it is unnecessary to defer the CTI
resource release until device unregistration.

This commit releases the resources directly in cti_remove() and remove
the injected release callback.

Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: Mike Leach <mike.leach@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20260224-arm_coresight_refactor_cti_resource_release-v1-1-ff1b2bca9176@arm.com