net: wireless: rtlwifi: rtl8192de: phy.c: Cleaning up uninitialized variable

There is a risk that the variables will be used without being initialized.
Have also moved variable to the part of the code where it is used.

This was largely found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/rtl8192de/phy.c

@@ -203,11 +203,12 @@ u32 rtl92d_phy_query_bb_reg(struct ieee80211_hw *hw, u32 regaddr, u32 bitmask)
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
 	u32 returnvalue, originalvalue, bitshift;
-	u8 dbi_direct;
 
 	RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE, "regaddr(%#x), bitmask(%#x)\n",
 		 regaddr, bitmask);
 	if (rtlhal->during_mac1init_radioa || rtlhal->during_mac0init_radiob) {
+		u8 dbi_direct = 0;
+
 		/* mac1 use phy0 read radio_b. */
 		/* mac0 use phy1 read radio_b. */
 		if (rtlhal->during_mac1init_radioa)