Gheorghe Guran <roatlasro@yahoo.com> redone at91sam7 driver. Old driver source file renamed. The old driver is still invoked by default and the new driver is invoked by using at91sam7_new

git-svn-id: svn://svn.berlios.de/openocd/trunk@1007 b42882b7-edfa-0310-969c-e2dbd0fdcd60