The phyCORE-i.MX 6Solo/DualLight is available with low-cost and
full-featured phyBOARD-Mira. One crucial difference is the supported
max. ethernet speed. On the full-featured Mira it is 1000 MBit/s but on
the low-cost Mira it is only 100 MBit/s. To cover this difference two
different images are necessary for low-cost and full-featured. Thus a
low-cost variant is added for the phyCORE-i.MX 6Solo with NAND and the
phyCORE-i.MX 6 DualLight with eMMC.

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