soc: neorv32: the NEORV32 does not fully support ISA A extension

The NEORV32 v1.8.6 does not fully support the RISC-V ISA A
extension. Remove it and enable support for atomic operations in C
regardless of the version used.

Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>
1 file changed