drivers: crypto: Add STM32 CRYP crypto driver

This patch adds crypto driver support for all STM32F4 devices providing
a CRYP peripheral.
This driver implements the AES ECB, CBC and CTR modes of operation.

It has been tested on a STM32F437 SoC running the Zephyr crypto driver
sample.

Signed-off-by: Markus Fuchs <markus.fuchs@de.sauter-bc.com>