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)

Add GPIO bus to config and hints. Also add sample gpioled device.

- Add driver for PCF2123, SPI real time clock/calendar

Fix svn properties and remove a P4 keyword.

Using svn cp rather than cp to copy these files over had the benefit
of preserving their history. It had the problem that it also copied
over mergeinfo data. Since we're retiring the projects/mips branch,
I'm removing the svn:mergeinfo property from them all.

Submitted by: jhb

Merge from projects/mips to head by hand:

Copy over AR71XX.hints file.

- Reorganize hints according to if_arge changes: set media
for multiPHY MAC and use mask to specify PHYs.

- Add arge1 to hints files, only one port is supported so far

- Add commented hint required for RouterStation(non PRO) board

- Add AR71XX watchdog timer driver

- Add spibus and mx25l device

- Rollback to the hack with 3-bytes offset in base address.
uart_bus_XXXXX resources are handled in uart(4) code
and we need more sophysticated way to define which space
should be used for device based on hints

- Expand memory window for apb to include OHCI memory region
- Add hints for EHCI and OHCI controllers

- Handle byte-order issue for non-word accesses to memory mapped
registers with ar71xx_bus_space_reversed. Note, that byte order
of values is handled by drivers. bus_spaces fixes only position
of register in word.
- Replace .hints hack for AR71XX UART with ar71xx_bus_space_reversed.

- Revert changes accidentally killed by merge operation

- Add GE0 port to hinted devices, GE1 will stay commented for a while

- Add ar71xx PCI bridge implementation and link it to the build

- Add apb and uart hints for AR71XX kernel