udev: run link_update() with increased retry count in second invocation

udev: run link_update() with increased retry count in second invocation

In PR #17431 we have introduced retry loop in link_update() in order to
maximize the chance that we end up with correct target when there are
multiple contenders for given symlink.

Number of iterations in retry loop is either 1 or
LINK_UPDATE_MAX_RETRIES, depending on the value of 'initialized' db
flag. When device appears for the first time we need to set the
flag before calling link_update() via update_devnode() for the second
time to make sure we run the second invocation with higher retry loop
counter.