strider: Add DP501 support for cpu model

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>

mpc85xx: Add gdsys ControlCenter Digital board

The gdsys ControlCenter Digital board is based on a Freescale P1022 QorIQ SOC.
It boots from SPI-Flash but can be configured to boot from SD-card for
factory programming and testing.
On board peripherals include:
- 2x GbE
- Lattice ECP3 FPGA connected via PCIe
- mSATA RAID1
- USB host
- DisplayPort video output
- Atmel TPM

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Reinhard Pfau <reinhard.pfau@gdsys.cc>
Signed-off-by: Andy Fleming <afleming@freescale.com>