selftests: gpio: gpio-sim: Use same variable name for sysfs pathname
SYSFS_PATH can be used locally and globally, especially that has
the same content.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
authored by