panfrost: Free batch->dependencies

panfrost: Free batch->dependencies

On glmark2-es2 -bterrain:

594.05KB leaked over 9282 calls from:
    panfrost_batch_update_bo_access
      at ../src/gallium/drivers/panfrost/pan_job.c:462
      in /home/alyssa/rockchip_dri.so
    panfrost_batch_add_bo
      at ../src/gallium/drivers/panfrost/pan_job.c:560
    panfrost_batch_add_bo
      at ../src/gallium/drivers/panfrost/pan_job.c:519
      in /home/alyssa/rockchip_dri.so
    panfrost_batch_add_resource_bos
      at ../src/gallium/drivers/panfrost/pan_job.c:569
    panfrost_batch_add_fbo_bos
      at ../src/gallium/drivers/panfrost/pan_job.c:588
      in /home/alyssa/rockchip_dri.so
    panfrost_create_batch
      at ../src/gallium/drivers/panfrost/pan_job.c:126

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Cc: mesa-stable
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6373>