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Implement a hw semaphore which is used to track the gpfifo submission. This is implementation used when the userd.gp_get() is not defined and also the feature flag NVGPU_SUPPORT_SEMA_BASED_GPFIFO_GET is set. At the end of each job submitted, submit a semaphore to write the gpfifo get pointer at hw semaphore addr. At next job submission processing we will read the gpfifo.get from the designated hw semaphore location. JIRA NVGPU-9588 Change-Id: Ic88ace1a3f60e3f38f159e1861464ebcaea04469 Signed-off-by: Ramalingam C <ramalingamc@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2898143 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Sagar Kamble <skamble@nvidia.com> Reviewed-by: Martin Radev <mradev@nvidia.com> Reviewed-by: Ankur Kishore <ankkishore@nvidia.com> Tested-by: Martin Radev <mradev@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>