linux/generic/pending-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/pending-5.15/101-Use-stddefs.h-instead-of-compiler.h.patch

@@ -1,3 +1,16 @@
+From d3c5b26768dbe990c4e1bd79e420c11ce7491d51 Mon Sep 17 00:00:00 2001
+From: OpenWrt community <openwrt-devel@lists.openwrt.org>
+Date: Wed, 13 Jul 2022 11:36:00 +0200
+Subject: [PATCH] swab: use stddefs.h instead of compiler.h
+
+Fix an issue with kernel headers that broke perf.
+
+---
+ include/uapi/linux/swab.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/uapi/linux/swab.h b/include/uapi/linux/swab.h
+index 7272f85d6d6a..3736f2fe1541 100644
 --- a/include/uapi/linux/swab.h
 +++ b/include/uapi/linux/swab.h
 @@ -3,7 +3,7 @@
@@ -9,3 +22,5 @@
  #include <asm/bitsperlong.h>
  #include <asm/swab.h>
  
+-- 
+