staging: rtl8821ae: fix sparse warning for static declarations in rtl8821ae/stats.c

This patch fixes the following sparse warnings in rtl8821ae/stats.c

drivers/staging/rtl8821ae/stats.c:62:6: warning: symbol 'rtl_translate_todbm' was not declared. Should it be static?
drivers/staging/rtl8821ae/stats.c:101:6: warning: symbol 'rtl_process_ui_rssi' was not declared. Should it be static?
Signed-off-by: Hoang Tran <hoangtran.gwr@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8821ae/stats.c

@@ -59,7 +59,7 @@ u8 rtl_evm_db_to_percentage(char value)
 }
 //EXPORT_SYMBOL(rtl_evm_db_to_percentage);
 
-long rtl_translate_todbm(struct ieee80211_hw *hw,
+static long rtl_translate_todbm(struct ieee80211_hw *hw,
 			 u8 signal_strength_index)
 {
 	long signal_power;
@@ -98,7 +98,8 @@ long rtl_signal_scale_mapping(struct ieee80211_hw *hw, long currsig)
 }
 //EXPORT_SYMBOL(rtl_signal_scale_mapping);
 
-void rtl_process_ui_rssi(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
+static void rtl_process_ui_rssi(struct ieee80211_hw *hw,
+				struct rtl_stats *pstatus)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_phy *rtlphy = &(rtlpriv->phy);