Nucleo STM32F401 and 411RE uart driver with 8 bits and even parity does not work

[yogeshbio]

On NucleoF401 and 411RE, UART driver with 8 bits and even parity does not work.
The MSB and Parity bits interfere and hence communication does not work for UART1.

UART baud 115200 bps actually becomes 116800 bps. This also needs a correction so that it works at exact baud of 115200 bps.

[0xc0170]

cc @bcostm

[ciarmcom]

ARM Internal Ref: IOTMORF-254

[LMESTM]

@yogk the management of parity bits is being corrected in #4216
@sg- I'd propose to close this issue and follow-up in #4216