kernel: backport list_count_nodes()

It's needed by various stuff we backport. That includes NVMEM changes
queued for v6.8.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

package/kernel/mac80211/Makefile

@@ -11,7 +11,7 @@ include $(INCLUDE_DIR)/kernel.mk
 PKG_NAME:=mac80211
 
 PKG_VERSION:=6.5
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 # PKG_SOURCE_URL:=@KERNEL/linux/kernel/projects/backports/stable/v5.15.58/
 PKG_SOURCE_URL:=http://mirror2.openwrt.org/sources/
 PKG_HASH:=908c22dceba185eab83caa5a1e58ce6b3ebdc58f099c3fd3e11c7352ebfab2d7

package/kernel/mac80211/patches/build/220-list-don-t-backport-list_count_nodes.patch

@@ -0,0 +1,26 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Fri, 15 Dec 2023 10:17:21 +0100
+Subject: [PATCH] list: don't backport list_count_nodes()
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It's redundant in OpenWrt as it backports it on its own. This fixes:
+backport-include/linux/list.h:11:22: error: redefinition of 'list_count_nodes'
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+---
+ backport-include/linux/list.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/backport-include/linux/list.h
++++ b/backport-include/linux/list.h
+@@ -3,7 +3,7 @@
+ #include_next <linux/list.h>
+ #include <linux/version.h>
+ 
+-#if LINUX_VERSION_IS_LESS(6,3,0)
++#if 0 /* OpenWrt backports list_count_nodes() on its own */
+ /**
+  * list_count_nodes - count nodes in the list
+  * @head:	the head for your list.