Fix build when CONFIG_NET is not enabled.
Fixes these build errors:
WARNING: "sk_unattached_filter_destroy" [lib/test_bpf.ko] undefined!
WARNING: "kfree_skb" [lib/test_bpf.ko] undefined!
WARNING: "sk_unattached_filter_create" [lib/test_bpf.ko] undefined!
WARNING: "sk_run_filter_int_skb" [lib/test_bpf.ko] undefined!
WARNING: "__alloc_skb" [lib/test_bpf.ko] undefined!
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 config TEST_BPF
        tristate "Test BPF filter functionality"
        default n
-       depends on m
+       depends on m && NET
        help
          This builds the "test_bpf" module that runs various test vectors
          against the BPF interpreter or BPF JIT compiler depending on the