sys/crypto: Allow CCM encryption with AAD of length > 24
sys/crypto: Allow CCM encryption with AAD of length > 24

Fixes parts of issue #8107

kaspar030/RIOT,authmillenon/RIOT,smlng/RIOT,kYc0o/RIOT,jasonatran/RIOT,OTAkeys/RIOT,smlng/RIOT,basilfx/RIOT,miri64/RIOT,authmillenon/RIOT,x3ro/RIOT,x3ro/RIOT,mtausig/RIOT,basilfx/RIOT,mtausig/RIOT,basilfx/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,kYc0o/RIOT,ant9000/RIOT,mtausig/RIOT,kaspar030/RIOT,mtausig/RIOT,RIOT-OS/RIOT,miri64/RIOT,RIOT-OS/RIOT,x3ro/RIOT,x3ro/RIOT,jasonatran/RIOT,authmillenon/RIOT,yogo1212/RIOT,OlegHahm/RIOT,yogo1212/RIOT,toonst/RIOT,x3ro/RIOT,toonst/RIOT,kYc0o/RIOT,toonst/RIOT,ant9000/RIOT,mtausig/RIOT,kaspar030/RIOT,jasonatran/RIOT,yogo1212/RIOT,jasonatran/RIOT,kaspar030/RIOT,OTAkeys/RIOT,authmillenon/RIOT,OlegHahm/RIOT,smlng/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,smlng/RIOT,basilfx/RIOT,miri64/RIOT,smlng/RIOT,OlegHahm/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,basilfx/RIOT,OTAkeys/RIOT,yogo1212/RIOT,OTAkeys/RIOT,ant9000/RIOT,kYc0o/RIOT,authmillenon/RIOT,yogo1212/RIOT,ant9000/RIOT,ant9000/RIOT,miri64/RIOT,OlegHahm/RIOT,toonst/RIOT,jasonatran/RIOT,miri64/RIOT,OTAkeys/RIOT,toonst/RIOT,kaspar030/RIOT