linux/generic/hack-5.15: add missing patch headers

This patches does not have a valid patch headers and does not apply on
an external git tree with 'git am'. To fix this add the missing headers.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

target/linux/generic/hack-5.15/253-ksmbd-config.patch

@@ -1,3 +1,15 @@
+From dcd966fa7ca63f38cf7147e1184d13d66e2ca340 Mon Sep 17 00:00:00 2001
+From: OpenWrt community <openwrt-devel@lists.openwrt.org>
+Date: Wed, 13 Jul 2022 13:33:30 +0200
+Subject: [PATCH] Kconfig: add tristate for OID and ASNI string
+
+---
+ init/Kconfig | 2 +-
+ lib/Kconfig  | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/init/Kconfig b/init/Kconfig
+index 5a2514bbb11d..32ba9490a6e4 100644
 --- a/init/Kconfig
 +++ b/init/Kconfig
 @@ -2384,7 +2384,7 @@ config PADATA
@@ -9,6 +21,8 @@
  	help
  	  Build a simple ASN.1 grammar compiler that produces a bytecode output
  	  that can be interpreted by the ASN.1 stream decoder and used to
+diff --git a/lib/Kconfig b/lib/Kconfig
+index d6c6cfd1fac9..6595c53abd3c 100644
 --- a/lib/Kconfig
 +++ b/lib/Kconfig
 @@ -614,7 +614,7 @@ config LIBFDT
@@ -20,3 +34,5 @@
  	help
  	  Enable fast lookup object identifier registry.
  
+-- 
+