Follow-up iRMC driver doc update
Follow-up iRMC driver doc update

This is a nit follow-up patch of "Update iRMC driver doc for soft
reboot and soft power off" [1] to add URLs to ServerView Agents and
iRMC S4 Manual.

 [1] I0987349e71086757e404e954596e301cad59709c

Change-Id: Idf0bda1ea660096043379556d08ba3027d1b9e85
Partial-Bug: #1526226

openstack/ironic,SauloAislan/ironic,NaohiroTamura/ironic,SauloAislan/ironic,pshchelo/ironic,NaohiroTamura/ironic,pshchelo/ironic,openstack/ironic