mt76: add linux kernel 6.6 support

package/kernel/mt76/patches/002-fix-page-pool.patch

@@ -0,0 +1,24 @@
+--- a/mac80211.c
++++ b/mac80211.c
+@@ -4,7 +4,9 @@
+  */
+ #include <linux/sched.h>
+ #include <linux/of.h>
++#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
+ #include <net/page_pool.h>
++#endif
+ #include "mt76.h"
+ 
+ #define CHAN2G(_idx, _freq) {			\
+--- a/mt76.h
++++ b/mt76.h
+@@ -15,6 +15,9 @@
+ #include <linux/average.h>
+ #include <linux/soc/mediatek/mtk_wed.h>
+ #include <net/mac80211.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(6,4,0)
++#include <net/page_pool/helpers.h>
++#endif
+ #include "util.h"
+ #include "testmode.h"
+