gpu: nvgpu: gp10b: enable clock gating features

Enable clock gating power features: slcg, blcg and elcg

Bug 200144583

Reviewed-on: http://git-master/r/821149
(cherry picked from commit 1980d443c64e6660e3cd41b8908964c07459dcce)

Change-Id: I6ce813552fa57d0fd14dd7ed6a3d9864c88dc58b
Signed-off-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/818636
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

drivers/gpu/nvgpu/gp10b/platform_gp10b_tegra.c

@@ -216,6 +216,9 @@ struct gk20a_platform t18x_gpu_tegra_platform = {
 	/* power management configuration */
 	.can_railgate           = false,
 	.enable_elpg            = false,
+	.enable_blcg		= true,
+	.enable_slcg		= true,
+	.enable_elcg		= true,
 
 	/* ptimer scaling constant */
 	.ptimerscaling10x	= 10,