xhci: Switch only Intel Lynx Point-LP ports to EHCI on shutdown.

xhci: Switch only Intel Lynx Point-LP ports to EHCI on shutdown.

Patch "xhci: Switch Intel Lynx Point ports to EHCI on shutdown."
commit 64b04df4e5d34814d64ef426bf4a2ac73473c6fd is not fully correct

It switches both Lynx Point and Lynx Point-LP ports to EHCI on shutdown.
On some Lynx Point machines it causes spurious interrupt,
which wake the system: bugzilla.kernel.org/show_bug.cgi?id=76291

On Lynx Point-LP on the contrary switching ports to EHCI seems to be
necessary to fix these spurious interrupts.

Signed-off-by: Denis Turischev <denis@compulab.co.il>
Reported-by: Wulf Richartz <wulf.richartz@gmail.com>
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>