Debian 13 Trixie gpiod API change

[wb2osz]

Thanks to David and Martin for pointing this out.

direwolf fails to build on Debian 13 Trixie because many of the gpiod API functions have been removed.

Here's the commit to libgpiod that removes the 'gpiod_chip_open_by_name' function, with the explanation for why it was removed:

brgl/libgpiod@eb690e4

[wb2osz]

This is the only remaining open function found in gpiod,h:

/**

• @brief Open a chip by path.
• @param path Path to the gpiochip device file.
• @return GPIO chip object or NULL if an error occurred. The returned object

•     must be closed by the caller using ::gpiod_chip_close.
  

*/
struct gpiod_chip *gpiod_chip_open(const char *path);