drm/colorop: Use destroy callback for color pipeline teardown

drm/colorop: Use destroy callback for color pipeline teardown

Switch drm_colorop_pipeline_destroy() to use the driver-provided
destroy callback instead of directly calling drm_colorop_cleanup()
and freeing the object.

This allows drivers that embed struct drm_colorop in driver-specific
objects to perform correct teardown.

Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260202094202.2871478-9-chaitanya.kumar.borah@intel.com