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* drop 661-fq_codel_keep_dropped_stats.patch - outdated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-3.18/251-sound_kconfig.patch

@@ -0,0 +1,18 @@
+--- a/sound/core/Kconfig
++++ b/sound/core/Kconfig
+@@ -10,13 +10,13 @@ config SND_DMAENGINE_PCM
+ 	tristate
+ 
+ config SND_HWDEP
+-	tristate
++	tristate "Sound hardware support"
+ 
+ config SND_RAWMIDI
+ 	tristate
+ 
+ config SND_COMPRESS_OFFLOAD
+-	tristate
++	tristate "Compression offloading support"
+ 
+ # To be effective this also requires INPUT - users should say:
+ #    select SND_JACK if INPUT=y || INPUT=SND