genkeymap: Fix an array declaration conflict
genkeymap: Fix an array declaration conflict

The conflict on the size of xfree86_to_evdev between genkeymap.c and
evdev-map.c is causing build failures in openSUSE builds

metalefty/xrdp,metalefty/xrdp,PKRoma/xrdp,metalefty/xrdp,PKRoma/xrdp,neutrinolabs/xrdp,neutrinolabs/xrdp,PKRoma/xrdp,neutrinolabs/xrdp