tools: ynl: Print xsk-features from the sample

In a similar fashion we do for the other bit masks.
Fix mask parsing (>= vs >) while we are it.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20231127190319.1190813-4-sdf@google.com


Signed-off-by: Alexei Starovoitov <ast@kernel.org>