iwlwifi: optimize struct iwl_cmd_meta layout

Having a u32 before a potential 64-bit value is
not very efficient, move it last.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-trans-pcie-int.h

@@ -139,10 +139,10 @@ struct iwl_cmd_meta {
 	/* only for SYNC commands, iff the reply skb is wanted */
 	struct iwl_host_cmd *source;
 
-	u32 flags;
-
 	DEFINE_DMA_UNMAP_ADDR(mapping);
 	DEFINE_DMA_UNMAP_LEN(len);
+
+	u32 flags;
 };
 
 /*