Changes:
- Copied over board files for blackpill_f401ce
- Changed appropriate soc dtsi from stm32f401Xe.dtsi to stm32f401Xc.dtsi
- Replaced any instance of F401CE to F401CC
- Added blackpill_401cc to adc test
In essense the blackpill_f401ce and blackpill_f401cc are the exact
same boards,
the f401cc variant of the stm32 mcu has lesser sram and flash than
the f401ce.
Signed-off-by: Sahaj Sarup <sahaj.sarup@linaro.org>
