Device-specific GPIO API extensions

Topics
	Ambiq
	Ambiq GPIO controller
	Bouffalolab BL61x GPIO FIFO / Wire Out
	Interfaces for BL61x GPIO FIFO / Wire Out .
	MAX32-specific GPIO Flags
	MAX32-specific GPIO Flags .
	NCT38XX
	Nuvoton NCT38XX series I2C-based GPIO expander
	NXP MCUX LPC
	NXP MCUX LPC GPIO controller
	NXP PCAL64XXA
	NXP PCAL64XXA I2C-based I/O expander
	STM32 GPIO specific flags
	STM32 GPIO specific flags .
	SX1509B
	Semtech SX1509B low-voltage level-shifting GPIO controller
	nPM13xx-specific GPIO Flags
	nPM13xx-specific GPIO Flags
	nPM2100-specific GPIO Flags
	nPM2100-specific GPIO Flags
	nPM6001-specific GPIO Flags
	nPM6001-specific GPIO Flags
	nRF-specific GPIO Flags
	nRF-specific GPIO Flags

Detailed Description