apps.intel_mp.intel_mp: fix device unbinding for Intel driver

Make sure the device is unbound before map_pci_address() is
called. Needs to be done more properly.

src/apps/intel_mp/intel_mp.lua

@@ -360,6 +360,9 @@ function Intel:new (conf)
    self.max_q = byid.max_q
 
    -- Setup device access
+   -- XXX: must call unbind before map, must figure out
+   -- how to do this properly.
+   pci.unbind_device_from_linux(self.pciaddress)
    self.base, self.fd = pci.map_pci_memory_unlocked(self.pciaddress, 0)
    self.master = self.fd:flock("ex, nb")