cpu/esp32: reflecting xtimer's member change
cpu/esp32: reflecting xtimer's member change

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