ehci: Only delay UHCI/OHCI port scan until after EHCI setup completes

ehci: Only delay UHCI/OHCI port scan until after EHCI setup completes

EHCI controller setup needs to occur prior to checking any UHCI or
OHCI ports to ensure a high speed device is not mistakenly configured
on a full speed "companion" controller.  However, only the UHCI/OHCI
port scan needs to be delayed, not the full UHCI/OHCI controller init.

This change moves back the ehci controller setup check until port
scan in UHCI/OHCI.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>