Move falcon_gk20a.c|h to hal/falcon/falcon_gk20a.c as per new unit separation requirement. JIRA NVGPU-2038 Change-Id: If2b7ff78293fc1bd9983399d2bc5261d2365e7f2 Signed-off-by: Sagar Kamble <skamble@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/2072380 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>