RISC-V: Remove __vdso_cmpxchg{32,64} symbol versions

These were left over from an earlier version of the port.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Palmer Dabbelt 2017-11-20 10:33:09 -08:00
commit b7e5a59150