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>
Move all STM32 based board pinmux files into the board dirs so we are
consistent across all the STM32 platforms/boards.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>