wifi: rtlwifi: rtl8192se: remove redundant rtl_get_bbreg() call

Extra rtl_get_bbreg() call looks like redundant reading. The read has
already been done in the "else" branch. Compile test only.

Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Peter Kosyh <pkosyh@yandex.ru>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221205085342.677329-1-pkosyh@yandex.ru

drivers/net/wireless/realtek/rtlwifi/rtl8192se/phy.c

@@ -115,9 +115,6 @@ static u32 _rtl92s_phy_rf_serial_read(struct ieee80211_hw *hw,
 		retvalue = rtl_get_bbreg(hw, pphyreg->rf_rb,
 					 BLSSI_READBACK_DATA);
 
-	retvalue = rtl_get_bbreg(hw, pphyreg->rf_rb,
-				 BLSSI_READBACK_DATA);
-
 	rtl_dbg(rtlpriv, COMP_RF, DBG_TRACE, "RFR-%d Addr[0x%x]=0x%x\n",
 		rfpath, pphyreg->rf_rb, retvalue);