Add support for two new SPI Flash chips to existing Open Source project.

I have the following Open Source application that programs the SPI flash of my circuit boards. [login to view URL] SVN - [login to view URL] It currently support programming all Atmel AT45DB SPI Flash but I need support for the following SPI Flash chips to be added: -SST25VF040B -M25P40-VMN6TPBCT-ND ([login to view URL]) ([login to view URL]) This should not be very difficult, the M25P40 chip uses the same page structure so should just need a new idcode added. The SST uses a different scheme so some new code will need to be added to the existing framework.