UsbDk: Fix paged memory access under spinlock
UsbDk: Fix paged memory access under spinlock

This patch fixes access to bus device relations array
allocated from paged memory pool under child device list
spinlock.

Fixed by creation of temporary non-paged copy of the paged data.

Signed-off-by: Dmitry Fleytman <f50f56ffad4b379c2a89812e98b14900ef87e9ea@redhat.com>

daynix/UsbDk,daynix/UsbDk,SPICE/win32-usbdk,SPICE/win32-usbdk