staging: rtl8192e: Remove equation that results in constant for chnl_plan

Remove equation for chnl_plan as the last line sets chnl_plan to a
constant.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/d6fbe3d2297d1d5502b183785f14df51a81e3331.1700296319.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c

@@ -387,23 +387,15 @@ static void _rtl92e_read_eeprom_info(struct net_device *dev)
 
 	rtl92e_init_adaptive_rate(dev);
 
-	priv->chnl_plan = priv->eeprom_chnl_plan;
-
 	switch (priv->eeprom_customer_id) {
 	case EEPROM_CID_NetCore:
 		priv->customer_id = RT_CID_819X_NETCORE;
 		break;
 	case EEPROM_CID_TOSHIBA:
 		priv->customer_id = RT_CID_TOSHIBA;
-		if (priv->eeprom_chnl_plan & 0x80)
-			priv->chnl_plan = priv->eeprom_chnl_plan & 0x7f;
-		else
-			priv->chnl_plan = 0x0;
 		break;
 	}
 
-	if (priv->chnl_plan > CHANNEL_PLAN_LEN - 1)
-		priv->chnl_plan = 0;
 	priv->chnl_plan = COUNTRY_CODE_WORLD_WIDE_13;
 
 	if (priv->eeprom_vid == 0x1186 &&  priv->eeprom_did == 0x3304)