Revert "xhci: Switch PPT ports to EHCI on shutdown."

This reverts commit 0adf7a085fae52b18202a95722fc05d644fa7a42.

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	drivers/usb/host/xhci.c
	drivers/usb/host/xhci.h