gpu: nvgpu: enable CONFIG_NVGPU_LS_PMU for safety

Enable CONFIG_NVGPU_LS_PMU for dGPU safety build.
Add missing #ifdefs for CONFIG_NVGPU_POWER_PG and
CONFIG_NVGPU_CLK_ARB which are not defined for safety build.

Moved gm20b_mc_is_enabled to fusa code.

NVGPU_UNIT_PWR is only defined when CONFIG_NVGPU_HAL_NON_FUSA
is defined. Added #ifdefs to compile out gk20a_pmu functions
that are using it.

Jira NVGPU-4661

Change-Id: Ieb552f9374bad6f3dad777322f118931e0bc94ec
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2317085
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit

drivers/gpu/nvgpu/common/pmu/perf/perf.c

@@ -51,7 +51,9 @@ static int pmu_set_boot_clk_runcb_fn(void *arg)
 		}
 		vfe_init->state_change = false;
 
+#ifdef CONFIG_NVGPU_CLK_ARB
 		nvgpu_clk_arb_schedule_vf_table_update(g);
+#endif
 	}
 
 	return 0;