Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Update the stm32f1 code to the latest from ST. Merge the lib/cmsis-stm32f1/ and lib/hal-stm32f1/ into a single lib/stm32f1/ directory. Document all the differences from the pristine upstream code. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>