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 8336876cd556476efb39886c4bc642803a041b17.

We are ripping out commit 1a12bd45e30778db6ec0ca16ce0a71bb96ed4503 "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