bitops: Add more files to the MAINTAINERS

It seems we have at least one more file to be added to the MAINTAINERS
that corresponds to bit operations.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <ynorov@nvidia.com>

Author: andy-shev

MAINTAINERS

@@ -4466,6 +4466,7 @@ F:	arch/*/lib/bitops.c
 F:	include/asm-generic/bitops
 F:	include/asm-generic/bitops.h
 F:	include/linux/bitops.h
+F:	include/linux/count_zeros.h
 F:	lib/hweight.c
 F:	lib/test_bitops.c
 F:	lib/tests/bitops_kunit.c