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)

Modify the spi flash driver to allow smaller read IO sizes, but enforce
the larger, aligned write+erase sizes the driver currently implements.

This preserves write behaviour but makes the flash driver usable for things
like a read-only FFS or a geom_uzip/geom_compress .

Note that since GEOM will now return the sector size as being smaller,
writes of sector size/alignment will now fail with an EIO. Code which
writes to the flash device will have to be (for now) manually taught
about the flash write blocksize.

Add support for the m25p64; lifted straight from Linux.

This flash chip is found on the Ubiquiti LS-SR71 board.
I've successfully tested reading; I've not tried writing to it yet.

Add s25sl064a, an 8mb SPI flash part.

Fix naming to be consistent.

Extend the mx25l erase function to support different erase commands.

Extend the mx25l flash device support to include a set of per-device
flags.

Some of these parts will support 4K/32K block erases rather than
a sector erase. This includes (at least) the MX25L128.

Fix KASSERT() messages to reflect reality.

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:

Merge support for MX25L spi flash.

- Code reorg: extract mx25l_read and mx25l_write methods
- Add entry for Spansion flash controller
Submitted by: Eric L. Chen <lihong@ieee.org>

- Add write support for mx25l flash chip
- Some minor style(9) fixes

- Add support for MX25Lxxx SPI flash (readonly atm)