soundwire: intel: remove X86 dependency

This is not needed and may generate unmet dependencies when
COMPILE_TEST is used for SOF.

ACPI is required, and should be tested when selecting this option.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190916185739.32184-3-pierre-louis.bossart@linux.intel.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>