Add support for the phycore i.MX6 UltraLite.
 - 512MB RAM
 - 512MB NAND
 - 10/100 Mbit Ethernet

Signed-off-by: Christian Hemp <c.hemp@phytec.de>
Signed-off-by: Stefan Lengfeld <s.lengfeld@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The extra environment folder for the phyCORE-i.MX6 had the suffix
'-mira'. That's the name of a baseboard. Since the bootloader is generic
for all baseboards, use a generic suffix for the environment folder.

Signed-off-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add Phytec phyCORE-i.MX6 SOM.
    Support:
     - imx6q-phytec-phycore-som-nand:
        - 1GB RAM on 1 Bank with 64Bit
        - 1GBit Ethernet
        - SPI NOR
        - NAND
        - SD
        - UART

     - imx6q-phytec-phycore-som-emmc
        - 1GB RAM on 1 Bank with 64Bit
        - 1GBit Ethernet
        - SPI NOR
        - eMMC
        - SD
        - UART

Signed-off-by: Christian Hemp <c.hemp@phytec.de>
Signed-off-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The main idea behind this patch is to avoid redundant code.  Because of
the module similarities of all i.MX6 based phytec boards, we can merge
its code.

The phytec-som-imx6 merges the code of all i.MX6 based phytec SOMs.  So
we will have only one "board" in the barebox for phyCARD-i.MX6 and
phyFLEX-i.MX6.

Signed-off-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>