changed configured and firmware_name sysfs files behavior, added vme_addr32
updated svec-config tool

- added vme_addr32 to have convenient access to WB slave registers
- changed behavior of configure file
  * 0 resets card (svec_fw_cmd_reset)
  * 1 configures and writes firmware from file
  * 2 loads firmware from buffer (svec_fw_cmd_program)
- changed behavior of firmware_name file – just stores fw_name
- added -g gateware parameter to svec-config