[PATCH 14/22] riscv: Consolidade atomic-machine.h and remove ununsed atomic macros

[Wilco Dijkstra]

Hi Adhemerval,
 
> The resulting definitions are not Linux specific, so move the header
> to generic sysdep folder.

LGTM. Consolidade -> Consolidate again

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>

Cheers,
Wilco