Revert "mwl8k: remove synchronous device init hack"

This reverts commit cb037d1842.
See 6aa07b8202 for more information

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/kernel/mac80211/patches/940-mwl8k_init_devices_synchronously.patch

@@ -0,0 +1,20 @@
+--- a/drivers/net/wireless/marvell/mwl8k.c
++++ b/drivers/net/wireless/marvell/mwl8k.c
+@@ -6264,6 +6264,8 @@ static int mwl8k_probe(struct pci_dev *p
+ 
+ 	priv->running_bsses = 0;
+ 
++	wait_for_completion(&priv->firmware_loading_complete);
++
+ 	return rc;
+ 
+ err_stop_firmware:
+@@ -6297,8 +6299,6 @@ static void mwl8k_remove(struct pci_dev
+ 		return;
+ 	priv = hw->priv;
+ 
+-	wait_for_completion(&priv->firmware_loading_complete);
+-
+ 	if (priv->fw_state == FW_STATE_ERROR) {
+ 		mwl8k_hw_reset(priv);
+ 		goto unmap;