bpf: linux/bpf.h needs linux/numa.h

Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/bpf.h

@@ -14,6 +14,7 @@
 #include <linux/percpu.h>
 #include <linux/err.h>
 #include <linux/rbtree_latch.h>
+#include <linux/numa.h>
 
 struct perf_event;
 struct bpf_prog;