counter: intel-qep: Remove linux/bitops.h include

0-DAY CI Kernel Test Service reported following iwyu warning:

drivers/counter/intel-qep.c:11:1: iwyu: warning: superfluous #include <linux/bitops.h>

Remove that include since we don't seem to use anything from it.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20210629111657.2655688-1-jarkko.nikula@linux.intel.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/counter/intel-qep.c

@@ -8,7 +8,6 @@
  * Author: Jarkko Nikula <jarkko.nikula@linux.intel.com>
  * Author: Raymond Tan <raymond.tan@intel.com>
  */
-#include <linux/bitops.h>
 #include <linux/counter.h>
 #include <linux/kernel.h>
 #include <linux/module.h>