clk: mvebu: use SPDX-License-Identifier

Convert the remaining files to SPDX license description.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

clk: mvebu: armada-39x: add clk description for supported interfaces

Both SATA and second USB3.0 interface are supported in Armada-39x SoC
family. Add necessary clk description, so both xhci and sata drivers
can be correctly initialized.

The binding documentation has also been updated accordingly.

Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

clk: mvebu: add Marvell Armada 39x driver

This commit adds a new clock driver for the Marvell Armada 39x family
of processors. This driver is fairly similar to the ones already used
on other Marvell EBU processors, with the following main differences:

* Different set of ratios
* Different set of core clocks
* Configurable reference clock in frequency

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>