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* drop 661-fq_codel_keep_dropped_stats.patch - outdated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/hack-4.9/202-reduce_module_size.patch

@@ -0,0 +1,29 @@
+From fd66884da2f96d2a7ea73f58b1b86251b959a913 Mon Sep 17 00:00:00 2001
+From: Felix Fietkau <nbd@nbd.name>
+Date: Fri, 7 Jul 2017 16:56:19 +0200
+Subject: kernel: strip unnecessary symbol table information from kernel modules
+
+reduces default squashfs size on ar71xx by about 4k
+
+lede-commit: 058d331a39077f159ca8922f1f422a1346d6aa67
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Makefile b/Makefile
+index a40b373eba3a..984eb5907d00 100644
+--- a/Makefile
++++ b/Makefile
+@@ -407,7 +407,7 @@ KBUILD_CFLAGS_KERNEL :=
+ KBUILD_AFLAGS   := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
+ KBUILD_AFLAGS_MODULE  := -DMODULE
+ KBUILD_CFLAGS_MODULE  := -DMODULE
+-KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
++KBUILD_LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds $(if $(CONFIG_PROFILING),,-s)
+ 
+ # Read KERNELRELEASE from include/config/kernel.release (if it exists)
+ KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
+-- 
+2.11.0
+