cgroup: Fix CGROUP_BPF config

CGROUP_BPF depended on SOCK_CGROUP_DATA which can't be manually
enabled, making it rather challenging to turn CGROUP_BPF on.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

init/Kconfig

@@ -1156,7 +1156,8 @@ config CGROUP_PERF
 
 config CGROUP_BPF
 	bool "Support for eBPF programs attached to cgroups"
-	depends on BPF_SYSCALL && SOCK_CGROUP_DATA
+	depends on BPF_SYSCALL
+	select SOCK_CGROUP_DATA
 	help
 	  Allow attaching eBPF programs to a cgroup using the bpf(2)
 	  syscall command BPF_PROG_ATTACH.