rtlwifi: Install updated rate-mapping routine

In preparation for fixing the rate-mapping situation, place a driver-agnostic
version in rtlwifi. This one contains the updated rate incormation.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Chaoming Li <chaoming_li@realsil.com.cn>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rtlwifi/base.h b/drivers/net/wireless/rtlwifi/base.h
index a91f3ee..4ae9059 100644
--- a/drivers/net/wireless/rtlwifi/base.h
+++ b/drivers/net/wireless/rtlwifi/base.h
@@ -140,4 +140,6 @@
 void rtl_recognize_peer(struct ieee80211_hw *hw, u8 *data, unsigned int len);
 u8 rtl_tid_to_ac(struct ieee80211_hw *hw, u8 tid);
 extern struct attribute_group rtl_attribute_group;
+int rtlwifi_rate_mapping(struct ieee80211_hw *hw,
+			 bool isht, u8 desc_rate, bool first_ampdu);
 #endif