Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Convert Marvell ARM platforms to FDT convention.

The following systems are involved:

- DB-88F5182
- DB-88F5281
- DB-88F6281
- DB-78100
- SheevaPlug

This overhaul covers the following major changes:

- All integrated peripherals drivers for Marvell ARM SoC, which are
currently in the FreeBSD source tree are reworked and adjusted so they
derive config data out of the device tree blob (instead of hard coded /
tabelarized values).

- Since the common FDT infrastrucutre (fdtbus, simplebus) is used we say
good by to obio / mbus drivers and numerous hard-coded config data.

Note that world needs to be built WITH_FDT for the affected platforms.

Reviewed by: imp
Sponsored by: The FreeBSD Foundation.

Enable all populated TWSI (I2C) controllers on Marvell SOCs.

Obtained from: Semihalf

Introduce ata(4) support for Marvell integrated SATA controllers (found on
88F5xxx, 88F6xxx and MV78xxx system on chip devices).

Reviewed by: stas
Obtained from: Semihalf

Move the memory layout definitions and logic from mvreg.h to mvwin.h
so that it isn't exposured unless needed. In particular this means
that it's easier to tune the memory layout based on board details.
While here, remove inclusion of <machine/intr.h> from mvreg.h. This
also contains exposure to SoC specifics in MI drivers, because NIRQ
depends on the SoC.

Improve and extend Marvell SOCs platform code.

- Allow for setting per platform MPP/GPIO configuration in the kernel, so
that we can override all settings firmware might set.

- Set decode windows for the remaining on-chip peripherals: CESA, SATA and XOR.

- Improve handling of USB controllers so that all port are available on the
given SOC/platform (e.g. up to three on DB-78xxx), this includes rework of
USB decode windows set-up.

- Other minor fixes and cosmetics.

Obtained from: Semihalf

Adjust Marvell SOC support for A0 chip revision.

- Clean up TCLK handling so that it's dynamically recognized depending on
registers settings or chip version/revision. Update registers definitions.

- Teach SOC ident routine about A0 (initial silicon version for general
audience)

Obtained from: Marvell, Semihalf

PCI/PCI-Express support for Marvell systems.

Obtained from: Marvell, Semihalf

Introduce basic support for Marvell families of system-on-chip ARM devices:

* Orion
- 88F5181
- 88F5182
- 88F5281

* Kirkwood
- 88F6281

* Discovery
- MV78100

The above families of SOCs are built around CPU cores compliant with ARMv5TE
instruction set architecture definition. They share a number of integrated
peripherals. This commit brings support for the following basic elements:

* GPIO
* Interrupt controller
* L1, L2 cache
* Timers, watchdog, RTC
* TWSI (I2C)
* UART

Other peripherals drivers will be introduced separately.

Reviewed by: imp, marcel, stass (Thanks guys!)
Obtained from: Marvell, Semihalf