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/pending-4.14/920-mangle_bootargs.patch

@@ -31,7 +31,7 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
  	help
 --- a/init/main.c
 +++ b/init/main.c
-@@ -359,6 +359,29 @@ static inline void setup_nr_cpu_ids(void
+@@ -360,6 +360,29 @@ static inline void setup_nr_cpu_ids(void
  static inline void smp_prepare_cpus(unsigned int maxcpus) { }
  #endif
  
@@ -61,7 +61,7 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
  /*
   * We need to store the untouched command line for future reference.
   * We also need to store the touched command line since the parameter
-@@ -536,6 +559,7 @@ asmlinkage __visible void __init start_k
+@@ -541,6 +564,7 @@ asmlinkage __visible void __init start_k
  	add_device_randomness(command_line, strlen(command_line));
  	boot_init_stack_canary();
  	mm_init_cpumask(&init_mm);