openssl: Inherit riscv32 config from latomic config on linux

We still need this option for riscv32, the patch is also submitted
upstream

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>