selftests: xsk: run all tests for busy-poll

Execute all xsk selftests for busy-poll mode too. Currently they were
only run for the standard interrupt driven softirq mode. Replace the
unused option queue-id with the new option busy-poll.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/r/20220510115604.8717-4-magnus.karlsson@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>