The current ACRN-Configurator allow user add duplicate PCI devices to
passthrough which it is not correct.
This patch add an assert to check the duplicate of PCI devices.
Tracked-On: #6690
Signed-off-by: Chenli Wei <chenli.wei@linux.intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
