drm/amdgpu: add gmc support for dimgrey_cavefish

Same as navy_flounder.
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Jiansong Chen <Jiansong.Chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c

@@ -763,6 +763,7 @@ static int gmc_v10_0_mc_init(struct amdgpu_device *adev)
 		case CHIP_SIENNA_CICHLID:
 		case CHIP_NAVY_FLOUNDER:
 		case CHIP_VANGOGH:
+		case CHIP_DIMGREY_CAVEFISH:
 		default:
 			adev->gmc.gart_size = 512ULL << 20;
 			break;
@@ -829,6 +830,7 @@ static int gmc_v10_0_sw_init(void *handle)
 	case CHIP_SIENNA_CICHLID:
 	case CHIP_NAVY_FLOUNDER:
 	case CHIP_VANGOGH:
+	case CHIP_DIMGREY_CAVEFISH:
 		adev->num_vmhubs = 2;
 		/*
 		 * To fulfill 4-level page support,
@@ -943,6 +945,7 @@ static void gmc_v10_0_init_golden_registers(struct amdgpu_device *adev)
 	case CHIP_SIENNA_CICHLID:
 	case CHIP_NAVY_FLOUNDER:
 	case CHIP_VANGOGH:
+	case CHIP_DIMGREY_CAVEFISH:
 		break;
 	default:
 		break;