Revert "xhci: Set scatter-gather limit to avoid failed block writes."

Revert "xhci: Set scatter-gather limit to avoid failed block writes."

This reverts commit be148bbdc89174752ed1c43170d2dbbe5356bce3.

We are ripping out commit cf2ee2971dedd8618aee4331d5d29576f6804995 "usb:
xhci: Link TRB must not occur within a USB payload burst" because it's a
hack that caused regressions in the usb-storage and userspace USB
drivers that use usbfs and libusb.  This commit attempted to fix the
issues with that patch.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org #3.12