Fix docs for clock_gpio_init etc for RP2350

You can also use gpios 13 and 15 on RP2350

Author: peterharperuk

src/rp2_common/hardware_clocks/include/hardware/clocks.h

@@ -399,7 +399,7 @@ void clocks_enable_resus(resus_callback_t resus_callback);
 /*! \brief Output an optionally divided clock to the specified gpio pin.
  *  \ingroup hardware_clocks
  *
- * \param gpio The GPIO pin to output the clock to. Valid GPIOs are: 21, 23, 24, 25. These GPIOs are connected to the GPOUT0-3 clock generators.
+ * \param gpio The GPIO pin to output the clock to. Valid GPIOs are: 21 (or 13 on RP2350), 23 (or 15 on RP2350), 24, 25. These GPIOs are connected to the GPOUT0-3 clock generators.
  * \param src  The source clock. See the register field CLOCKS_CLK_GPOUT0_CTRL_AUXSRC for a full list. The list is the same for each GPOUT clock generator.
  * \param div_int  The integer part of the value to divide the source clock by. This is useful to not overwhelm the GPIO pin with a fast clock. This is in range of 1..2^24-1 on RP2040
  *                 and 1..2^16-1 on RP2350
@@ -410,7 +410,7 @@ void clock_gpio_init_int_frac16(uint gpio, uint src, uint32_t div_int, uint16_t
 /*! \brief Output an optionally divided clock to the specified gpio pin.
  *  \ingroup hardware_clocks
  *
- * \param gpio The GPIO pin to output the clock to. Valid GPIOs are: 21, 23, 24, 25. These GPIOs are connected to the GPOUT0-3 clock generators.
+ * \param gpio The GPIO pin to output the clock to. Valid GPIOs are: 21 (or 13 on RP2350), 23 (or 15 on RP2350), 24, 25. These GPIOs are connected to the GPOUT0-3 clock generators.
  * \param src  The source clock. See the register field CLOCKS_CLK_GPOUT0_CTRL_AUXSRC for a full list. The list is the same for each GPOUT clock generator.
  * \param div_int  The integer part of the value to divide the source clock by. This is useful to not overwhelm the GPIO pin with a fast clock. This is in range of 1..2^24-1 on RP2040
  *                 and 1..2^16-1 on RP2350
@@ -428,7 +428,7 @@ static inline void clock_gpio_init_int_frac(uint gpio, uint src, uint32_t div_in
 /*! \brief Output an optionally divided clock to the specified gpio pin.
  *  \ingroup hardware_clocks
  *
- * \param gpio The GPIO pin to output the clock to. Valid GPIOs are: 21, 23, 24, 25. These GPIOs are connected to the GPOUT0-3 clock generators.
+ * \param gpio The GPIO pin to output the clock to. Valid GPIOs are: 21 (or 13 on RP2350), 23 (or 15 on RP2350), 24, 25. These GPIOs are connected to the GPOUT0-3 clock generators.
  * \param src  The source clock. See the register field CLOCKS_CLK_GPOUT0_CTRL_AUXSRC for a full list. The list is the same for each GPOUT clock generator.
  * \param div  The float amount to divide the source clock by. This is useful to not overwhelm the GPIO pin with a fast clock.
  */