wifi: rtl8xxxu: Fix assignment to bit field priv->cck_agc_report_type

Just because priv->cck_agc_report_type is only one bit doesn't mean
it works like a bool. The value assigned to it loses all bits except
bit 0, so only assign 0 or 1 to it.

This affects the RTL8192EU, but rtl8xxxu already can't connect to any
networks with this chip, so it probably didn't bother anyone.

Fixes: 2ad2a813 ("wifi: rtl8xxxu: Fix the CCK RSSI calculation")
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/7bb4858c-5cef-9cae-5e08-7e8444e8ba89@gmail.com

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c

@@ -4208,10 +4208,12 @@ static int rtl8xxxu_init_device(struct ieee80211_hw *hw)
 		 * should be equal or CCK RSSI report may be incorrect
 		 */
 		val32 = rtl8xxxu_read32(priv, REG_FPGA0_XA_HSSI_PARM2);
-		priv->cck_agc_report_type = val32 & FPGA0_HSSI_PARM2_CCK_HIGH_PWR;
+		priv->cck_agc_report_type =
+			u32_get_bits(val32, FPGA0_HSSI_PARM2_CCK_HIGH_PWR);
 
 		val32 = rtl8xxxu_read32(priv, REG_FPGA0_XB_HSSI_PARM2);
-		if (priv->cck_agc_report_type != (bool)(val32 & FPGA0_HSSI_PARM2_CCK_HIGH_PWR)) {
+		if (priv->cck_agc_report_type !=
+		    u32_get_bits(val32, FPGA0_HSSI_PARM2_CCK_HIGH_PWR)) {
 			if (priv->cck_agc_report_type)
 				val32 |= FPGA0_HSSI_PARM2_CCK_HIGH_PWR;
 			else