Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.22.46;
Make gttswi MI and usuable from non-Marvell SoCs.
(should rename to mvi2c but ...)

Fix build failed with ofppc.
Move 'attach mvspi at mvsoc' to arch/arm/marvell/files.marvell.

Move mvspi defines into sys/dev/marvell/files.discovery.

branches: 1.19.2; 1.19.4;
Add Marvell CESA(Cryptographic Engines and Security Accelerator) module driver.
But support only PIO-mode now. Also AES-CBC not supported.
Don't know how to process to AES CBC in PIO-mode. I haven't found IV registers.

branches: 1.18.8;
Add Marvell EHCI Controller wrapper.
However, because this driver has some problems now, it will not work the
way things are going.

Add Marvell Secure Digital Input/Output (SDIO) Interface Driver.

Add SATA for Marvell SC/SoC.

Add UART and PCIe controller for Marvell SoC.
However not define attribute *_mbus in our tree yet.

Remove unnecessary define.
Reorder.
Add necessary attributes.

Add Marvell Gigabit Ethernet Controller on SC/SoC.
Will support on ofppc soon.
Tested on G4+PegasosII (kiyohara@)
G3+PegasosII (phx@)

Enable gtidmac.

Clean up gt and peripherals.
This change tested compile only.

branches: 1.10.74; 1.10.96; 1.10.98;
merge ktrace-lwp.

Add entry for gti2c.c

branches: 1.8.4; 1.8.6;
"gtpci" doesn't provide an ISA bus, so it shouldn't have an "isabus"
attribute

Typos in comment description.

branches: 1.6.2;
Add an option to control whether the GT's internal PCI Arbiter should
be enabled or not.

defflag GT_ECC.

Add GT_PCI{0,1}_{IO,MEM}{SIZE,START} options

Make gtmpsc configurable via config file. (baud rate source, frequency).

Cleanup. Move much of the code to bus_space instead of using
private mechanisms.

Add preliminary support Marvell (Galileo) Discovery System Controllers.
This code was contributed by Allegro Networks.