onewire_master: set project specific config

lib/onewire_master.c

@@ -29,13 +29,13 @@
  *  @note external pull-up resistor on pin is required (< 5 kOhm)
  *  @{
  */
-#define ONEWIRE_MASTER_PIN PC9  /**< GPIO pin */
+#define ONEWIRE_MASTER_PIN PB8  /**< GPIO pin */
 /** @} */
 
 /** @defgroup onewire_master_timer timer used to measure 1-wire signal timing
  *  @{
  */
-#define ONEWIRE_MASTER_TIMER 5 /**< timer ID */
+#define ONEWIRE_MASTER_TIMER 3 /**< timer ID */
 /** @} */
 
 /** set if the timer ISR should be set in the interrupt table instead of the vector table