soundwire: intel: use correct header for io calls

Commit df72b719

 ("soundwire: intel: add missing headers for
cross-compilation") tried to fix cross compilation but erroneously used
wrong header in one of the file. Fix it by using correct io.h header.

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: df72b719

 ("soundwire: intel: add missing headers for cross-compilation")
Signed-off-by: Vinod Koul <vkoul@kernel.org>