René Widera 02689e2722 fix documentation for popcll (#2309) ...

Change return type from int to unsigned int.
It is correctly documented in hip-math-api.md but not at the place where this PR is updating the documentation.

[ROCm/hip commit: 7eaa45d2d5]

2021-08-19 10:27:51 +05:30

..

hip

fix documentation for popcll (#2309)

2021-08-19 10:27:51 +05:30