Reset head and tail on admin queue initialization where H/T are
not reset by HW.

Change-ID: I6db8a2dd3f05ce66410a92cce016191add04760e
Signed-off-by: NMichal Kosiarz <michal.kosiarz@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>