rtlwifi: Use const in 8188ee/8723be/8821ae swing_table declarations

Reduce data usage about 1KB by using const.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200629055843.25394-1-pkshih@realtek.com

drivers/net/wireless/realtek/rtlwifi/rtl8188ee/dm.c

@@ -870,11 +870,11 @@ static void dm_txpower_track_cb_therm(struct ieee80211_hw *hw)
 	/*0.1 the following TWO tables decide the
 	 *final index of OFDM/CCK swing table
 	 */
-	s8 delta_swing_table_idx[2][15]  = {
+	static const s8 delta_swing_table_idx[2][15]  = {
 		{0, 0, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11},
 		{0, 0, -1, -2, -3, -4, -4, -4, -4, -5, -7, -8, -9, -9, -10}
 	};
-	u8 thermal_threshold[2][15] = {
+	static const u8 thermal_threshold[2][15] = {
 		{0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 27},
 		{0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 25, 25, 25}
 	};

drivers/net/wireless/realtek/rtlwifi/rtl8723be/dm.c

@@ -736,11 +736,11 @@ static void rtl8723be_dm_txpower_tracking_callback_thermalmeter(
 	u8 ofdm_min_index = 6;
 	u8 index_for_channel = 0;
 
-	s8 delta_swing_table_idx_tup_a[TXSCALE_TABLE_SIZE] = {
+	static const s8 delta_swing_table_idx_tup_a[TXSCALE_TABLE_SIZE] = {
 		0, 0, 1, 2, 2, 2, 3, 3, 3, 4,  5,
 		5, 6, 6, 7, 7, 8, 8, 9, 9, 9, 10,
 		10, 11, 11, 12, 12, 13, 14, 15};
-	s8 delta_swing_table_idx_tdown_a[TXSCALE_TABLE_SIZE] = {
+	static const s8 delta_swing_table_idx_tdown_a[TXSCALE_TABLE_SIZE] = {
 		0, 0, 1, 2, 2, 2, 3, 3, 3, 4,  5,
 		5, 6, 6, 6, 6, 7, 7, 7, 8, 8,  9,
 		9, 10, 10, 11, 12, 13, 14, 15};