thunderbolt: No need to include <linux/acpi.h> in usb4_port.c

This include is not needed so drop it.
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/thunderbolt/usb4_port.c

@@ -6,7 +6,6 @@
  * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
  */
 
-#include <linux/acpi.h>
 #include <linux/pm_runtime.h>
 
 #include "tb.h"