The STiH410 is an advanced multi-HD AVC processor with 3D graphics acceleration
and 1.5-GHz ARM Cortex-A9 SMP CPU part of the stih407 family.

It has wide connectivity including USB 3.0, PCI-e, SATA and gigabit ethernet.
Signed-off-by: NPeter Griffin <peter.griffin@linaro.org>
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>

The stih410 soc which will be added in the following commit is very similar to
the stih407, to enable maximum re-use of the dt files this commit abstracts the
common parts into a shared dt file stihxxx-b2120 for the board, and also a shared
file stih407-family.dtsi for the SoC.
Signed-off-by: NPeter Griffin <peter.griffin@linaro.org>
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>

B2120 HDK is the reference board for STiH407 SoC.
It has the following characteristics:
 - 1GB DDR3
 - 8GB eMMC / SD-Card slot
 - 32MB NOR Flash
 - 1 x Gbit Ethernet
 - 1 x USB 3.0 port
 - 1 x Mini-PCIe
 - 1 x SATA
 - 1 x HDMI output
 - 1 x HDMI input
 - 1 x SPDIF

This patch only introduces basic functionnalities, such as I2C and UART.
Acked-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>