remove unused "SoC_text_number" field in GPIO_VALUES
remove unused "SoC_text_number" field in GPIO_VALUES

The last commit made this field unused.

Signed-off-by: Andy Doan <09032574f02f3d5e4e489a718b8705f28c474e94@linaro.org>

96boards/96BoardsGPIO,96boards/96BoardsGPIO,96boards/96BoardsGPIO,96boards/96BoardsGPIO