rtlwifi: rtl8192c: Remove set but not used variables 'reg_ecc','reg_eac'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/wireless/realtek/rtlwifi/rtl8192c/phy_common.c: In function rtl92c_phy_iq_calibrate:
drivers/net/wireless/realtek/rtlwifi/rtl8192c/phy_common.c:1373:6: warning: variable reg_ecc set but not used [-Wunused-but-set-variable]
drivers/net/wireless/realtek/rtlwifi/rtl8192c/phy_common.c: In function rtl92c_phy_iq_calibrate:
drivers/net/wireless/realtek/rtlwifi/rtl8192c/phy_common.c:1372:34: warning: variable reg_eac set but not used [-Wunused-but-set-variable]

They are not used since commit f1d2b4d3 ("rtlwifi:
rtl818x: Move drivers into new realtek directory")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtlwifi/rtl8192c/phy_common.c

@@ -1369,8 +1369,8 @@ void rtl92c_phy_iq_calibrate(struct ieee80211_hw *hw, bool b_recovery)
 	long result[4][8];
 	u8 i, final_candidate;
 	bool b_patha_ok, b_pathb_ok;
-	long reg_e94, reg_e9c, reg_ea4, reg_eac, reg_eb4, reg_ebc, reg_ec4,
-	    reg_ecc, reg_tmp = 0;
+	long reg_e94, reg_e9c, reg_ea4, reg_eb4, reg_ebc, reg_ec4,
+	    reg_tmp = 0;
 	bool is12simular, is13simular, is23simular;
 	u32 iqk_bb_reg[10] = {
 		ROFDM0_XARXIQIMBALANCE,
@@ -1445,21 +1445,17 @@ void rtl92c_phy_iq_calibrate(struct ieee80211_hw *hw, bool b_recovery)
 		reg_e94 = result[i][0];
 		reg_e9c = result[i][1];
 		reg_ea4 = result[i][2];
-		reg_eac = result[i][3];
 		reg_eb4 = result[i][4];
 		reg_ebc = result[i][5];
 		reg_ec4 = result[i][6];
-		reg_ecc = result[i][7];
 	}
 	if (final_candidate != 0xff) {
 		rtlphy->reg_e94 = reg_e94 = result[final_candidate][0];
 		rtlphy->reg_e9c = reg_e9c = result[final_candidate][1];
 		reg_ea4 = result[final_candidate][2];
-		reg_eac = result[final_candidate][3];
 		rtlphy->reg_eb4 = reg_eb4 = result[final_candidate][4];
 		rtlphy->reg_ebc = reg_ebc = result[final_candidate][5];
 		reg_ec4 = result[final_candidate][6];
-		reg_ecc = result[final_candidate][7];
 		b_patha_ok = true;
 		b_pathb_ok = true;
 	} else {