iwlwifi: fix queue flush confusion

The flush_control parameter to iwlagn_txfifo_flush
is passed as an internal value (context flags) and
then sent to the device, that can't be right.

Fix the confusion by removing the parameter, always
use IWL_DROP_ALL that is redefined according to the
firmware API in the flush control.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/dvm/commands.h b/drivers/net/wireless/iwlwifi/dvm/commands.h
index ac24861..71ab76b 100644
--- a/drivers/net/wireless/iwlwifi/dvm/commands.h
+++ b/drivers/net/wireless/iwlwifi/dvm/commands.h
@@ -986,8 +986,7 @@
 
 #define IWL_AGG_TX_QUEUE_MSK		cpu_to_le32(0xffc00)
 
-#define IWL_DROP_SINGLE		0
-#define IWL_DROP_ALL		(BIT(IWL_RXON_CTX_BSS) | BIT(IWL_RXON_CTX_PAN))
+#define IWL_DROP_ALL			BIT(1)
 
 /*
  * REPLY_TXFIFO_FLUSH = 0x1e(command and response)