stm32: Fix GPIO_PULLUP_ON and GPIO_PULLUP_OFF porttran API macros
stm32: Fix parity bit configuration. Stm32 considers the parity bit in the databit counting, making it necessary to enable 9 bit on some combinations where databits + parity exceeds 8 bits.
stm32: Implement NutNvMemErase
Add NutNetLoadDefaults to load default values for MAC Address and network settings to make it easier to implement a reset to factory settings function in applications.
STM32: Fix porttran GPIO which in turn fixes the HD44780 driver for STM32
STM32: Enable FLASH_CONF_SIZE on configurator. Was already in use on .conf files from boards but only available when hand editing the files.
AVR32: Missing interrupt handler for GPIO port 3.
AVR32: Improve stability with MACB on INT3.