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>