iwlwifi: remove agn rates info there

Code and data related to agn bitrates can be
part of the agn module rather than being in
the core module.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 4b3eb78..ba3ab04 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -87,6 +87,15 @@
 	IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 };
 
+static inline u8 iwl3945_get_prev_ieee_rate(u8 rate_index)
+{
+	u8 rate = iwl3945_rates[rate_index].prev_ieee;
+
+	if (rate == IWL_RATE_INVALID)
+		rate = rate_index;
+	return rate;
+}
+
 /* 1 = enable the iwl3945_disable_events() function */
 #define IWL_EVT_DISABLE (0)
 #define IWL_EVT_DISABLE_SIZE (1532/32)