ARM: dts: reference nodes to extend by phandles instead ...

Many device trees upstream have moved to memory@BASE_ADDRESS for the
memory node instead of a unit-name-less memory node. This has resulted
in breakage[1] in barebox, because some device trees feature an upstream
memory size that's not available in all variants and the barebox device
tree must override it, not create a second correct node next to the broken
one and risk of_add_memory allocating banks with bogus sizes.

To avoid this happening in future, to memory or to other nodes, extension
of nodes should happen via phandles throughout, because a phandle is assumed
to be more stable and if one is removed a compile error results instead
of creating a new node somewhere. For nodes lacking a phandle, we can
use the &{/path} syntax to declare an anonymous phandle that will fail
to compile when the upstream path changes. This is better than having
devices fail to boot at runtime.

[1]: 0d26ce1c11a1 ("ARM: Phytec phyFLEX i.MX6: delete wrong memory node")

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: dts: vf610-zii-dev-rev-b: Fix SPI flash node name ...

Latest upstream DTS renamed the node to flash@0, so we need to follow
suit.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: zii-vf610-dev-rev-b: Fix DTS warning ...

Add missing #address-cells and #size-cells to fix a warning

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: zii-vf610-dev-rev-b: Use SPDX tag in DTS ...

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: zii-vf610-dev-rev-b/c: Add support for BBU on SPI-NOR ...

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: vybrid: zii: Make use of DT code from Linux kernel ...

Now that vf610-zii-dev.dts, vf610-zii-dev-rev-b.dts and
vf610-zii-dev-rev-c.dts made their way from Linux to Barebox, convert
all relevant code to make use of them.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i.MX: vf610: Add support for ZII VF610 Dev Family ...

Add support for ZII VF610 Dev based designs such as:

    - VF610 Dev, revision B
    - VF610 Dev, revision C
    - CFU1, revision A
    - SPU3, revision A
    - SCU4 AIB, revision C

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>