[PKT_SCHED]: Kill pkt_act.h inlining.

This was simply making templates of functions and mostly causing a lot
of code duplication in the classifier action modules.

We solve this more cleanly by having a common "struct tcf_common" that
hash worker functions contained once in act_api.c can work with.

Callers work with real action objects that have the common struct
plus their module specific struct members.  You go from a common
object to the higher level one using a "to_foo()" macro which makes
use of container_of() to do the dirty work.

This also kills off act_generic.h which was only used by act_simple.c
and keeping it around was more work than the it's value.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tc_act/tc_ipt.h b/include/net/tc_act/tc_ipt.h
index cb37ad0..f7d25df 100644
--- a/include/net/tc_act/tc_ipt.h
+++ b/include/net/tc_act/tc_ipt.h
@@ -5,12 +5,13 @@
 
 struct xt_entry_target;
 
-struct tcf_ipt
-{
-	tca_gen(ipt);
-	u32 hook;
-	char *tname;
-	struct xt_entry_target *t;
+struct tcf_ipt {
+	struct tcf_common	common;
+	u32			tcfi_hook;
+	char			*tcfi_tname;
+	struct xt_entry_target	*tcfi_t;
 };
+#define to_ipt(pc) \
+	container_of(pc, struct tcf_ipt, common)
 
-#endif
+#endif /* __NET_TC_IPT_H */