Add Xilinx UARTLITE and MPC5200 PSC device files (serial ports)

Add Xilinx UARTLITE and MPC5200 PSC device files (serial ports)

From: Grant Likely <grant.likely@secretlab.ca>

The Xilinx UART Lite and MPC5200 Programmable Serial Controller (PSC)
devices have dedicated major/minor numbers.  Add them to the device
table data file so they get are present in the root filesystem