The patch 'net/hns3: rename Rx burst function' changed `simple'
Rx function name from 'scalar' to 'scalar simple', but doc
ignored that.
This patch fixed it.
Fixes: aa5baf47e1a3 ("net/hns3: rename Rx burst function")
Cc: stable@dpdk.org
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>