drm/amdgpu/soc15: add support for navy_flounder

Add soc support.
Signed-off-by: NJiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: NTao Zhou <Tao.Zhou1@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/nv.c

@@ -754,6 +754,12 @@ static int nv_common_early_init(void *handle)
 		}
 		adev->external_rev_id = adev->rev_id + 0x28;
 		break;
+	case CHIP_NAVY_FLOUNDER:
+		adev->cg_flags = 0;
+		adev->pg_flags = 0;
+		adev->external_rev_id = adev->rev_id + 0x32;
+		break;
+
 	default:
 		/* FIXME: not supported yet */
 		return -EINVAL;
@@ -980,6 +986,7 @@ static int nv_common_set_clockgating_state(void *handle,
 	case CHIP_NAVI14:
 	case CHIP_NAVI12:
 	case CHIP_SIENNA_CICHLID:
+	case CHIP_NAVY_FLOUNDER:
 		adev->nbio.funcs->update_medium_grain_clock_gating(adev,
 				state == AMD_CG_STATE_GATE);
 		adev->nbio.funcs->update_medium_grain_light_sleep(adev,