forked from Mirrors/opensbi

When a probe implementation just returns zero for not available and one for available then we don't need it, as the extension won't be registered at all if it would return zero and the Base extension probe function will already set out_val to 1 if not probe function is implemented. Currently all probe functions only return zero or one, so remove them all. Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org>