test/accept: clean code of accept test

This does three things:
 - change multishot_mask from uint to uint32_t
 - change multishot_mask != UINT_MAX check to ~multishot_mask != 0

The above two avoid compiler and arch influence. Make the logic more robost.

 - other cleaning to make code clearer.

Signed-off-by: Hao Xu <howeyxu@tencent.com>
Link: https://lore.kernel.org/r/20220617143603.179277-4-hao.xu@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed