boards: olimex stm32-e407, stm32f407g_disc1: Enable USB OTG Support

Enable USB OTG support for olimex stm32-e407 and stm32f407g_disc1
boards by adding USB OTG to the pinmux table. Also, fix out of
range endpoint addresses in CDC ACM case for STM32F4 based boards.

Signed-off-by: Sudarsana Nagineni <sudarsana.nagineni@intel.com>
3 files changed