gpu: nvgpu: move .exec_regops to only execute regops

HAL .exec_regops used to first validate regops then execute it, now
moving it to only execute the regops.

- It helps B0CC on HV. On server side it does not track profiler object,
but regops validation uses the profiler, so moving validation to client
side.
- The change also remove ctx_buffer_offset checking in
validate_reg_op_offset. The offset already checked again whitelists
which have be verified when update whitelist. Also vgpu does not have
information of ctx and golden image.
- Added function nvgpu_regops_exec to cover both regops validation and
execution.

Jira GVSCI-10351

Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Change-Id: I434e027290e263a8a64a25a55500f7294038c9c4
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2534252
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/os/linux/ioctl_prof.c

@@ -668,7 +668,7 @@ static int nvgpu_prof_ioctl_exec_reg_ops(struct nvgpu_profiler_object_priv *priv
 		}
 
 		err = nvgpu_gr_exec_with_err_for_instance(g, gr_instance_id,
-				g->ops.regops.exec_regops(g, tsg, prof,
+				nvgpu_regops_exec(g, tsg, prof,
 					priv->regops_staging_buf, num_ops,
 					&flags));
 		if (err) {