man: fix some typos

In dcb-app man page, 'direcly' should be 'directly'
In dcb-dcbx man page, 'respecively' should be 'respectively'
In devlink-dev man page, 'unspecificed' should be 'unspecified'

Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
3 files changed