ASoC: intel: remove disable_route_checks

It sets disable_route_checks flag after checking that parent driver
isn't SOF, but skylake driver was removed, so it is dead code.
We can remove last user of disable_route_checks.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Suggested-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Tested-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://patch.msgid.link/87v7uo268m.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: morimoto

sound/soc/intel/boards/skl_hda_dsp_generic.c

@@ -124,8 +124,6 @@ static int skl_hda_audio_probe(struct platform_device *pdev)
 		return ret;
 
 	card->dev = &pdev->dev;
-	if (!snd_soc_acpi_sof_parent(&pdev->dev))
-		card->disable_route_checks = true;
 
 	if (mach->mach_params.dmic_num > 0) {
 		card->components = devm_kasprintf(card->dev, GFP_KERNEL,