cpu/esp32: revise CAN support
cpu/esp32: revise CAN support

CAN interface is now supported in RIOT. Change feature table
accordingly.

Signed-off-by: Yegor Yefremov <379041fa42359f10443de1f461b1b247ec449fae@googlemail.com>

mtausig/RIOT,smlng/RIOT,mfrey/RIOT,mfrey/RIOT,miri64/RIOT,smlng/RIOT,yogo1212/RIOT,x3ro/RIOT,authmillenon/RIOT,josephnoir/RIOT,authmillenon/RIOT,OTAkeys/RIOT,josephnoir/RIOT,josephnoir/RIOT,cladmi/RIOT,miri64/RIOT,yogo1212/RIOT,mfrey/RIOT,x3ro/RIOT,authmillenon/RIOT,kaspar030/RIOT,toonst/RIOT,smlng/RIOT,smlng/RIOT,miri64/RIOT,rfuentess/RIOT,ant9000/RIOT,kYc0o/RIOT,yogo1212/RIOT,basilfx/RIOT,kaspar030/RIOT,mtausig/RIOT,toonst/RIOT,jasonatran/RIOT,toonst/RIOT,aeneby/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,x3ro/RIOT,miri64/RIOT,OlegHahm/RIOT,kYc0o/RIOT,josephnoir/RIOT,authmillenon/RIOT,rfuentess/RIOT,jasonatran/RIOT,mtausig/RIOT,OlegHahm/RIOT,jasonatran/RIOT,basilfx/RIOT,basilfx/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,ant9000/RIOT,rfuentess/RIOT,mtausig/RIOT,ant9000/RIOT,miri64/RIOT,kYc0o/RIOT,aeneby/RIOT,x3ro/RIOT,toonst/RIOT,kYc0o/RIOT,kaspar030/RIOT,aeneby/RIOT,yogo1212/RIOT,aeneby/RIOT,yogo1212/RIOT,josephnoir/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,cladmi/RIOT,ant9000/RIOT,OlegHahm/RIOT,authmillenon/RIOT,mtausig/RIOT,RIOT-OS/RIOT,basilfx/RIOT,mfrey/RIOT,cladmi/RIOT,jasonatran/RIOT,x3ro/RIOT,aeneby/RIOT,kaspar030/RIOT,rfuentess/RIOT,kaspar030/RIOT,smlng/RIOT,OTAkeys/RIOT,toonst/RIOT,authmillenon/RIOT,yogo1212/RIOT,mfrey/RIOT,OTAkeys/RIOT,cladmi/RIOT,ant9000/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,basilfx/RIOT,cladmi/RIOT,kYc0o/RIOT