suspend: empty default list of modules to unload

Now dom0 will initiate real suspend process in VMs with PCI devices, so
workaround with unloading modules no longer needed.
Additionally it looks like unloading ehci-pci causes suspend problems on
some hardware (C200 Series Chipset).

qubes-rpc/prepare-suspend

@@ -3,7 +3,7 @@
 action=$1
 [ -z "$action" ] && action=suspend
 
-MODULES_BLACKLIST="uhci_hcd ehci_pci ehci_hcd iwldvm"
+MODULES_BLACKLIST=""
 if [ -r /etc/qubes-suspend-module-blacklist ]; then
     MODULES_BLACKLIST="$MODULES_BLACKLIST `cat /etc/qubes-suspend-module-blacklist`"
 fi