Add support for coda960 in DT
adv7604: Add DT parsing support

This patch adds support for DT parsing of ADV7604 as well as ADV7611.
It needs to be improved in order to get ports parsing too.

Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
i2c: Add generic support passing secondary devices addresses

Some I2C devices have multiple addresses assigned, for example each address
corresponding to a different internal register map page of the device.
So far drivers which need support for this have handled this with a driver
specific and non-generic implementation, e.g. passing the additional address
via platform data.

This patch provides a new helper function called i2c_new_secondary_device()
which is intended to provide a generic way to get the secondary address
as well as instantiate a struct i2c_client for the secondary address.

The function expects a pointer to the primary i2c_client, a name
for the secondary address and an optional default address. The name is used
as a handle to specify which secondary address to get.

The default address is used as a fallback in case no secondary address
was explicitly specified. In case no secondary address and no default
address were specified the function returns NULL.

For now the function only supports look-up of the secondary address
from devicetree, but it can be extended in the future
to for example support board files and/or ACPI.

Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
adv7604: Add support for i2c_new_secondary_device

The ADV7604 has thirteen 256-byte maps that can be accessed via the main
I²C ports. Each map has it own I²C address and acts
as a standard slave device on the I²C bus.

If nothing is defined, it uses default addresses.
The main purpose is using two adv76xx on the same i2c bus.

Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>