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* drop 661-fq_codel_keep_dropped_stats.patch - outdated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-4.9/321-powerpc_crtsavres_prereq.patch

@@ -0,0 +1,31 @@
+From 107c0964cb8db7ca28ac5199426414fdab3c274d Mon Sep 17 00:00:00 2001
+From: "Alexandros C. Couloumbis" <alex@ozo.com>
+Date: Fri, 7 Jul 2017 17:14:51 +0200
+Subject: hack: arch: powerpc: drop register save/restore library from modules
+
+Upstream GCC uses a libgcc function for saving/restoring registers. This
+makes the code bigger, and upstream kernels need to carry that function
+for every single kernel module. Our GCC is patched to avoid those
+references, so we can drop the extra bloat for modules.
+
+lede-commit: e8e1084654f50904e6bf77b70b2de3f137d7b3ec
+Signed-off-by: Alexandros C. Couloumbis <alex@ozo.com>
+---
+ arch/powerpc/Makefile | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
+index 617dece67924..1146daa8e4c2 100644
+--- a/arch/powerpc/Makefile
++++ b/arch/powerpc/Makefile
+@@ -179,7 +179,6 @@ else
+ CHECKFLAGS	+= -D__LITTLE_ENDIAN__
+ endif
+ 
+-KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
+ 
+ ifeq ($(CONFIG_476FPE_ERR46),y)
+ 	KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
+-- 
+2.11.0
+