gpu: nvgpu: Enable ELPG init for gp10b

set can_elpg to true to support ELPG init

Bug N/A

Change-Id: I9bdf264689440ef715cf34a5332d03cb60c5aef7
Signed-off-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Reviewed-on: http://git-master/r/1152432
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

@@ -369,6 +369,7 @@ struct gk20a_platform t18x_gpu_tegra_platform = {
 	/* power management configuration */
 	.can_railgate           = true,
 	.enable_elpg            = true,
+	.can_elpg               = true,
 	.enable_blcg		= true,
 	.enable_slcg		= true,
 	.enable_elcg		= true,