kernel: split patches folder up into backport, pending and hack folders

* properly format/comment all patches
* merge debloat patches
* merge Kconfig patches
* merge swconfig patches
* merge hotplug patches
* drop 200-fix_localversion.patch - upstream
* drop 222-arm_zimage_none.patch - unused
* drop 252-mv_cesa_depends.patch - no longer required
* drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused
* drop 661-fq_codel_keep_dropped_stats.patch - outdated
* drop 702-phy_add_aneg_done_function.patch - upstream
* drop 840-rtc7301.patch - unused
* drop 841-rtc_pt7c4338.patch - upstream
* drop 921-use_preinit_as_init.patch - unused
* drop spio-gpio-old and gpio-mmc - unused

Signed-off-by: John Crispin <john@phrozen.org>

target/linux/generic/pending-3.18/653-disable_netlink_trim.patch

@@ -0,0 +1,30 @@
+--- a/net/netlink/af_netlink.c
++++ b/net/netlink/af_netlink.c
+@@ -1721,27 +1721,7 @@ void netlink_detachskb(struct sock *sk,
+ 
+ static struct sk_buff *netlink_trim(struct sk_buff *skb, gfp_t allocation)
+ {
+-	int delta;
+-
+ 	WARN_ON(skb->sk != NULL);
+-	if (netlink_skb_is_mmaped(skb))
+-		return skb;
+-
+-	delta = skb->end - skb->tail;
+-	if (is_vmalloc_addr(skb->head) || delta * 2 < skb->truesize)
+-		return skb;
+-
+-	if (skb_shared(skb)) {
+-		struct sk_buff *nskb = skb_clone(skb, allocation);
+-		if (!nskb)
+-			return skb;
+-		consume_skb(skb);
+-		skb = nskb;
+-	}
+-
+-	if (!pskb_expand_head(skb, 0, -delta, allocation))
+-		skb->truesize -= delta;
+-
+ 	return skb;
+ }
+