Some stm32 has alternate USART6 pinout on G9/G14 but others have it
on A12/A11. Unfortunately it's very difficult to make proper ifdefs for
this since position is based on package (and pincount) and not chip
itself. Creating such list would take a lot of time. Because of that
I just added another possible config for this pin and moved responsibility
of proper selection onto board code.
Signed-off-by: Michał Łyszczek <michal.lyszczek@bofc.pl>
87cec8d5c7