Update the ITE IT8500 EC support to match the current state of the flashrom-chromium tree

This code has been deployed and tested to work on the Cr-48.
There are a few caveats, though:
- The boot BIOS straps register must be modified to select LPC. This
  can be done with the "select_bbs.sh" script (Install iotools at
  http://code.google.com/p/iotools/ before using select_bbs).
- It is very important to disable power management daemons before
  running flashrom on this EC. I commented out the brute force method
  we use in the Chromium OS branch that disables powerd, since IIRC
  Carl-Daniel has a better approach in the works.
- Due to dependencies which may be introduced by the OEM/ODM EC
  firmware, the code is not guaranteed to work for anything other than
  the Cr-48.

Corresponding to flashrom svn r1263.

Signed-off-by: David Hendricks <dhendrix@google.com>

Carl-Daniel comments:
Code is not hooked up yet because probing needs to be sorted out.

Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

spi.c

@@ -55,6 +55,13 @@ const struct spi_programmer spi_programmer[] = {
 		.write_256 = ich_spi_write_256,
 	},
 
+	{ /* SPI_CONTROLLER_IT85XX */
+		.command = it85xx_spi_send_command,
+		.multicommand = default_spi_send_multicommand,
+		.read = ich_spi_read,
+		.write_256 = ich_spi_write_256,
+	},
+
 	{ /* SPI_CONTROLLER_IT87XX */
 		.command = it8716f_spi_send_command,
 		.multicommand = default_spi_send_multicommand,