mac80211: fix build error on kernel 6.6

The virtio_find_vqs() ABI has been changed since the 6.11 kernel.
Switch back to using the old ABI to fix the build error:

../mac80211-regular/backports-6.11/drivers/net/wireless/virtual/mac80211_hwsim.c: In function 'init_vqs':
../mac80211-regular/backports-6.11/drivers/net/wireless/virtual/mac80211_hwsim.c:6632:31: error: array type has incomplete element type 'struct virtqueue_info'
 6632 |         struct virtqueue_info vqs_info[HWSIM_NUM_VQS] = {
      |                               ^~~~~~~~
../mac80211-regular/backports-6.11/drivers/net/wireless/virtual/mac80211_hwsim.c:6637:16: error: too few arguments to function 'virtio_find_vqs'
 6637 |         return virtio_find_vqs(vdev, HWSIM_NUM_VQS,
      |                ^~~~~~~~~~~~~~~
In file included from ../mac80211-regular/backports-6.11/drivers/net/wireless/virtual/mac80211_hwsim.c:38:
./include/linux/virtio_config.h:224:5: note: declared here
  224 | int virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
      |     ^~~~~~~~~~~~~~~
../mac80211-regular/backports-6.11/drivers/net/wireless/virtual/mac80211_hwsim.c:6632:31: error: unused variable 'vqs_info' [-Werror=unused-variable]
 6632 |         struct virtqueue_info vqs_info[HWSIM_NUM_VQS] = {
      |                               ^~~~~~~~
../mac80211-regular/backports-6.11/drivers/net/wireless/virtual/mac80211_hwsim.c:6639:1: error: control reaches end of non-void function [-Werror=return-type]
 6639 | }
      | ^

Signed-off-by: Shiji Yang <[email protected]>

package/kernel/mac80211/patches/build/235-fix-init_vqs-build-error-on-kernel-6.6.patch

@@ -0,0 +1,30 @@
+--- a/drivers/net/wireless/virtual/mac80211_hwsim.c
++++ b/drivers/net/wireless/virtual/mac80211_hwsim.c
+@@ -6629,6 +6629,7 @@ static void hwsim_virtio_rx_done(struct
+ 
+ static int init_vqs(struct virtio_device *vdev)
+ {
++#if LINUX_VERSION_IS_GEQ(6,11,0)
+ 	struct virtqueue_info vqs_info[HWSIM_NUM_VQS] = {
+ 		[HWSIM_VQ_TX] = { "tx", hwsim_virtio_tx_done },
+ 		[HWSIM_VQ_RX] = { "rx", hwsim_virtio_rx_done },
+@@ -6636,6 +6637,19 @@ static int init_vqs(struct virtio_device
+ 
+ 	return virtio_find_vqs(vdev, HWSIM_NUM_VQS,
+ 			       hwsim_vqs, vqs_info, NULL);
++#else /* Using the old ABI, copied from kernel 6.6 */
++	vq_callback_t *callbacks[HWSIM_NUM_VQS] = {
++		[HWSIM_VQ_TX] = hwsim_virtio_tx_done,
++		[HWSIM_VQ_RX] = hwsim_virtio_rx_done,
++	};
++	const char *names[HWSIM_NUM_VQS] = {
++		[HWSIM_VQ_TX] = "tx",
++		[HWSIM_VQ_RX] = "rx",
++	};
++
++	return virtio_find_vqs(vdev, HWSIM_NUM_VQS,
++			       hwsim_vqs, callbacks, names, NULL);
++#endif
+ }
+ 
+ static int fill_vq(struct virtqueue *vq)