bpf: enable bpf syscall on x64 and i386

done as separate commit to ease conflict resolution

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
index 35dd922..281150b 100644
--- a/arch/x86/syscalls/syscall_64.tbl
+++ b/arch/x86/syscalls/syscall_64.tbl
@@ -327,6 +327,7 @@
 318	common	getrandom		sys_getrandom
 319	common	memfd_create		sys_memfd_create
 320	common	kexec_file_load		sys_kexec_file_load
+321	common	bpf			sys_bpf
 
 #
 # x32-specific system call numbers start at 512 to avoid cache impact