core: use gpiod_line_bulk_foreach_line_off() in line_request_values()
core: use gpiod_line_bulk_foreach_line_off() in line_request_values()

Use the provided helper macro instead of a manual for loop.

Signed-off-by: Bartosz Golaszewski <108de5fbc428215dc26df4468b48691526611148@gmail.com>

brgl/libgpiod,brgl/libgpiod,brgl/libgpiod,brgl/libgpiod