drm/amd: Enable seamless boot by default on newer ASICs

Seamless boot can technically be supported as far back as DCN1
but to avoid regressions on older hardware, enable it for DCN3 and
later.

If users report using the module parameter that it works on older
ASICs as well, this can be adjusted.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1361,9 +1361,9 @@ bool amdgpu_device_need_post(struct amdgpu_device *adev)
 /*
  * Check whether seamless boot is supported.
  *
- * So far we only support seamless boot on select ASICs.
- * If everything goes well, we may consider expanding
- * seamless boot to other ASICs.
+ * So far we only support seamless boot on DCE 3.0 or later.
+ * If users report that it works on older ASICS as well, we may
+ * loosen this.
  */
 bool amdgpu_device_seamless_boot_supported(struct amdgpu_device *adev)
 {
@@ -1383,14 +1383,7 @@ bool amdgpu_device_seamless_boot_supported(struct amdgpu_device *adev)
 	if (adev->mman.keep_stolen_vga_memory)
 		return false;
 
-	switch (adev->ip_versions[DCE_HWIP][0]) {
-	case IP_VERSION(3, 0, 1):
-		return true;
-	default:
-		break;
-	}
-
-	return false;
+	return adev->ip_versions[DCE_HWIP][0] >= IP_VERSION(3, 0, 0);
 }
 
 /*