drm/amdgpu: disable DC on KB/ML for now

Until I've had time to test it better.

bug: https://bugs.freedesktop.org/show_bug.cgi?id=102372

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1981,8 +1981,6 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 	case CHIP_BONAIRE:
 	case CHIP_HAWAII:
 	case CHIP_KAVERI:
-	case CHIP_KABINI:
-	case CHIP_MULLINS:
 	case CHIP_CARRIZO:
 	case CHIP_STONEY:
 	case CHIP_POLARIS11:
@@ -1993,9 +1991,10 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 	case CHIP_VEGA10:
 #if defined(CONFIG_DRM_AMD_DC_PRE_VEGA)
 		return amdgpu_dc != 0;
-#else
-		return amdgpu_dc > 0;
 #endif
+	case CHIP_KABINI:
+	case CHIP_MULLINS:
+		return amdgpu_dc > 0;
 #endif
 #if defined(CONFIG_DRM_AMD_DC) && defined(CONFIG_DRM_AMD_DC_DCN1_0)
 	case CHIP_RAVEN: