This renames the dcdofs config option in the imx-image tool to ivtofs.  dcdofs
is a misnomer. The DCD (Device Configuration Data) is only one part of the data
linked into the IVT (Image Vector Table), but the meaning of the option is
really the latter, not the former.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add Phytec phyCORE-i.MX6 QuadPlus:
 - imx6qp-phytec-phycore-som-nand:
   - 1GiB RAM on 2 Banks with 64Bit
   - 1000Mbit Ethernet
   - NAND
   - SD
   - UART

Signed-off-by: Christian Hemp <c.hemp@phytec.de>
Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>