iwlwifi: move rate helpers to iwlcore

This patch moves rate helpers to iwlcore.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-sta.c

@@ -824,7 +824,7 @@ static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 		rate_flags |= RATE_MCS_ANT_B_MSK; /*FIXME:RS*/
 
 		link_cmd.rs_table[i].rate_n_flags =
-			iwl4965_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
+			iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 		r = iwl4965_get_prev_ieee_rate(r);
 	}