include: dt-bindings: gpio: add vendor headers to gpio_interface_ext

Group the vendor headers into the doxygen group used for device-specific
GPIO API extensions as opposed to have them clutter top-level GPIO docs

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

Author: kartben

include/zephyr/dt-bindings/gpio/adi-max32-gpio.h

@@ -9,7 +9,7 @@
 /**
  * @brief MAX32-specific GPIO Flags
  * @defgroup gpio_interface_max32 MAX32-specific GPIO Flags
- * @ingroup gpio_interface
+ * @ingroup gpio_interface_ext
  * @{
  */
 

include/zephyr/dt-bindings/gpio/nordic-npm13xx-gpio.h

@@ -18,7 +18,7 @@
  * - Bit 10: Watchdog reset (0=OFF, 1=ON)
  * - Bit 11: Power loss warning (0=OFF, 1=ON)
  *
- * @ingroup gpio_interface
+ * @ingroup gpio_interface_ext
  * @{
  */
 

include/zephyr/dt-bindings/gpio/nordic-npm2100-gpio.h

@@ -16,7 +16,7 @@
  * - Bit 8: Drive strength (0=1mA, 1=6mA)
  * - Bit 9: Debounce (0=OFF, 1=ON)
  *
- * @ingroup gpio_interface
+ * @ingroup gpio_interface_ext
  * @{
  */
 

include/zephyr/dt-bindings/gpio/nordic-npm6001-gpio.h

@@ -16,7 +16,7 @@
  * - Bit 8: Drive strength (0=NORMAL, 1=HIGH)
  * - Bit 9: Input type (0=SCHMITT, 1=CMOS)
  *
- * @ingroup gpio_interface
+ * @ingroup gpio_interface_ext
  * @{
  */
 

include/zephyr/dt-bindings/gpio/nordic-nrf-gpio.h

@@ -9,7 +9,7 @@
 /**
  * @brief nRF-specific GPIO Flags
  * @defgroup gpio_interface_nrf nRF-specific GPIO Flags
- * @ingroup gpio_interface
+ * @ingroup gpio_interface_ext
  * @{
  */
 

include/zephyr/dt-bindings/gpio/nxp-s32-gpio.h

@@ -14,7 +14,7 @@
  *
  * - Bit 8: Interrupt controller to which the respective GPIO interrupt is routed.
  *
- * @ingroup gpio_interface
+ * @ingroup gpio_interface_ext
  * @{
  */
 

include/zephyr/dt-bindings/gpio/stm32-gpio.h

@@ -16,7 +16,7 @@
  * - Bit 8: Configure a GPIO pin to power on the system after Poweroff.
  * - Bit 10..9: Configure the output speed of a GPIO pin.
  *
- * @ingroup gpio_interface
+ * @ingroup gpio_interface_ext
  * @{
  */