x86, bpf: Cleanup the top of file header in bpf_jit_comp.c

Don't bother mentioning the file name as it is implied, and remove the
reference to internal BPF.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20211119163215.971383-2-hch@lst.de

arch/x86/net/bpf_jit_comp.c

 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * bpf_jit_comp.c: BPF JIT compiler
+ * BPF JIT compiler
  *
  * Copyright (C) 2011-2013 Eric Dumazet (eric.dumazet@gmail.com)
- * Internal BPF Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
+ * Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
  */
 #include <linux/netdevice.h>
 #include <linux/filter.h>