Revert "drm/amdgpu: disable gfxoff for navy_flounder"

This reverts commit 9c9b17a.
Newly released sdma fw (51.52) provides a fix for the issue.

Signed-off-by: Jiansong Chen <[email protected]>
Reviewed-by: Kenneth Feng <[email protected]>
Reviewed-by: Tao Zhou <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Jiansong Chen

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

@@ -3595,9 +3595,6 @@ static void gfx_v10_0_check_gfxoff_flag(struct amdgpu_device *adev)
 		if (!gfx_v10_0_navi10_gfxoff_should_enable(adev))
 			adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
 		break;
-	case CHIP_NAVY_FLOUNDER:
-		adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
-		break;
 	default:
 		break;
 	}