bpf-devices: fix cgroup v2 devices detection

If cgroup v2 bpf devices is supported we need to return 1, not -1.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

src/core/bpf-devices.c

@@ -243,5 +243,5 @@ int bpf_devices_supported(void) {
                 return supported = 0;
         }
 
-        return supported;
+        return supported = 1;
 }