Staging: rtl8192e: Rename variable ReturnPoint

Rename variable ReturnPoint to return_point to fix
checkpatch warning Avoid CamelCase.
Signed-off-by: Tree Davies <tdavies@darkphysics.net>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/20240310235552.4217-2-tdavies@darkphysics.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_core.c

@@ -964,7 +964,7 @@ static void _rtl92e_watchdog_wq_cb(void *data)
 		     MAC80211_NOLINK) &&
 		     (ieee->rf_power_state == rf_on) && !ieee->is_set_key &&
 		     (!ieee->proto_stoppping) && !ieee->wx_set_enc) {
-			if (ieee->pwr_save_ctrl.ReturnPoint == IPS_CALLBACK_NONE)
+			if (ieee->pwr_save_ctrl.return_point == IPS_CALLBACK_NONE)
 				rtl92e_ips_enter(dev);
 		}
 	}

drivers/staging/rtl8192e/rtllib.h

@@ -1051,7 +1051,7 @@ enum rt_rf_power_state {
 struct rt_pwr_save_ctrl {
 	bool				bSwRfProcessing;
 	enum rt_rf_power_state eInactivePowerState;
-	enum ips_callback_function ReturnPoint;
+	enum ips_callback_function return_point;
 
 	bool				bLeisurePs;
 	u8				lps_idle_count;