Change Details

``` # cd sys/riscv/conf # config GENERIC # config GENERICSF # cd ../compile/GENERIC # make CC="riscv64-unknown-freebsd13.0-gcc -E" kern_mib.o -n | grep gcc | sh | grep machine_arch | grep char static const char machine_arch[] = "riscv64"; # cd ../compile/GENERICSF # make CC="riscv64-unknown-freebsd13.0-gcc -E" kern_mib.o -n | grep gcc | sh | grep machine_arch | grep char static const char machine_arch[] = "riscv64sf"; # ```