kernel: bump 4.14 to 4.14.139

Refreshed all patches.

Also add a missing symbol for x86 which got used now in this bump.
- ISCSI_IBFT

Compile-tested on: cns3xxx, x86_64
Runtime-tested on: cns3xxx, x86_64

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

target/linux/generic/hack-4.14/902-debloat_proc.patch

@@ -232,7 +232,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  		return -ENOMEM;
 --- a/mm/vmalloc.c
 +++ b/mm/vmalloc.c
-@@ -2774,6 +2774,8 @@ static const struct file_operations proc
+@@ -2783,6 +2783,8 @@ static const struct file_operations proc
  
  static int __init proc_vmalloc_init(void)
  {