When compiling with clang on 32-bit platforms, we are missing
copies of 64-bit atomic functions. We can solve this by linking
against libatomic for the drivers and libs which need those
atomic ops.
Fixes: f0b9982cb3a7 ("event/octeontx2: add TIM bucket operations")
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>