Hello Prakash,
MQX does not provide support for PCIe. Actually the current MQX versions does not support any MicroProcessor featuring PCIe.
If you are interested in acquiring such driver you may contact MQX level 2 support or the NXP professional services and they can develop software that meets your applications requirements.
You can contact them in the following links:
www.nxp.com/mqx/support
www.nxp.com/services
Best regards,
Carlos