Make sure the adapter's management queue and the event queue are
available before any uppper layer driver (TOE, iWARP, or iSCSI)
registers with the base cxgbe(4) driver.

Submitted by:	Hariprasad at chelsio dot com
Reviewed by:	np@


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272183 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f