vhost-user: Skip unnecessary duplicated VHOST_USER_SET_LOG_BASE requests

vhost-user: Skip unnecessary duplicated VHOST_USER_SET_LOG_BASE requests

The VHOST_USER_SET_LOG_BASE requests should be categorized into
non-vring specific messages, and should be sent only once.
If send more than once, dpdk will munmap old log_addr which may has been used and cause segmentation fault.

Signed-off-by: BillXiang <xiangwencheng@dayudpu.com>
Message-Id: <20240613065150.3100-1-xiangwencheng@dayudpu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>