RUI Delay Microseconds

RUI_RETURN_STATUS rui_delay_us( uint32_t value );

@brief	This API is used to delay time in microseconds (µs).
@return	RUI_RETURN_STATUS
@param	uint32_t value: delay time value.
@module	RAK811, RAK4200, RAK4400, RAK4600, RAK5010 and RAK8212-M.