kernel: bump 4.14 to 4.14.11

Rename unwinder config symbols to match upstream changes.
Refresh patches.
Update patch that no longer applies: 202-reduce_module_size.patch

Also enable CONFIG_PAGE_TABLE_ISOLATION. This feature was backported
from 4.15 to the 4.14 stable series. It is enabled by default, so enable
it in OpenWrt as well.

Compile-tested on x86/64.
Runtime-tested on x86/64.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

target/linux/generic/hack-4.14/220-gc_sections.patch

@@ -21,9 +21,9 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/Makefile
 +++ b/Makefile
-@@ -410,6 +410,11 @@ KBUILD_AFLAGS_MODULE  := -DMODULE
- KBUILD_CFLAGS_MODULE  := -DMODULE
+@@ -405,6 +405,11 @@ KBUILD_CFLAGS_MODULE  := -DMODULE
  KBUILD_LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds $(if $(CONFIG_PROFILING),,-s)
+ GCC_PLUGINS_CFLAGS :=
  
 +ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
 +KBUILD_CFLAGS_KERNEL	+= $(call cc-option,-ffunction-sections,)
@@ -33,7 +33,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
-@@ -783,11 +788,6 @@ ifdef CONFIG_DEBUG_SECTION_MISMATCH
+@@ -784,11 +789,6 @@ ifdef CONFIG_DEBUG_SECTION_MISMATCH
  KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  endif