doc: add missing param in DT_INST_PIO_PIN_BY_NAME

Add missing '@param name' for DT_INST_PIO_PIN_BY_NAME macro.

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

include/zephyr/drivers/misc/pio_rpi_pico/pio_rpi_pico.h

@@ -122,7 +122,8 @@
 /**
  * @brief Get the pin number of a pin by its name.
  *
- * @param name Name of the pin (e.g. tx, rx, sck).
+ * @param inst instance number
+ * @param name name of the pin (e.g. tx, rx, sck).
  */
 #define DT_INST_PIO_PIN_BY_NAME(inst, name) \
 	DT_PIO_PIN_BY_NAME(DT_DRV_INST(inst), name)