gpu: nvgpu: remove Dynamic TPC-PG code

- Dynamic TPC-PG feature is not fully implemented and these variables
  are not using anywhere, so removing this code.

  JIRA NVGPU-5849

Change-Id: I4949e991a62e06f4aff10c3fbe7516546e49f55e
Signed-off-by: Seeta Rama Raju <srajum@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2544789
(cherry picked from commit bb28c7d8bfd873283b24e8a1812e23c554cc6c18)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2551208
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Vaibhav Kachore <vkachore@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

include/uapi/linux/nvgpu.h

@@ -35,9 +35,7 @@ struct nvgpu_tsg_bind_channel_ex_args {
 
 	/* in: VEID in Volta */
 	__u32 subcontext_id;
-	__u32 num_active_tpcs;
-	__u8 tpc_pg_enabled;
-	__u8 reserved[11];
+	__u8 reserved[16];
 };
 
 /*