cc2538_rf: Remove PAN ID initialization from reset

cpu/cc2538/include/cc2538_rf.h

@@ -57,7 +57,6 @@ extern "C" {
 
 #define CC2538_RF_POWER_DEFAULT     (IEEE802154_DEFAULT_TXPOWER)    /**< Default output power in dBm */
 #define CC2538_RF_CHANNEL_DEFAULT   (IEEE802154_DEFAULT_CHANNEL)
-#define CC2538_RF_PANID_DEFAULT     (IEEE802154_DEFAULT_PANID)
 
 #define OUTPUT_POWER_MIN            (-24)  /**< Min output power in dBm */
 #define OUTPUT_POWER_MAX            (7)    /**< Max output power in dBm */

cpu/cc2538/radio/cc2538_rf.c

@@ -88,7 +88,6 @@ void cc2538_init(void)
 
     cc2538_set_tx_power(CC2538_RF_POWER_DEFAULT);
     cc2538_set_chan(CC2538_RF_CHANNEL_DEFAULT);
-    cc2538_set_pan(CC2538_RF_PANID_DEFAULT);
     cc2538_set_addr_long(cc2538_get_eui64_primary());
 
     /* Select the observable signals (maximum of three) */

cpu/cc2538/radio/cc2538_rf_netdev.c

@@ -353,7 +353,6 @@ static int _init(netdev_t *netdev)
     cc2538_rf_t *dev = (cc2538_rf_t *) netdev;
     _dev = netdev;
 
-    uint16_t pan = cc2538_get_pan();
     uint16_t chan = cc2538_get_chan();
     uint16_t addr_short = cc2538_get_addr_short();
     uint64_t addr_long = cc2538_get_addr_long();
@@ -361,8 +360,6 @@ static int _init(netdev_t *netdev)
     netdev_ieee802154_reset(&dev->netdev);
 
     /* Initialise netdev_ieee802154_t struct */
-    netdev_ieee802154_set(&dev->netdev, NETOPT_NID,
-                          &pan, sizeof(pan));
     netdev_ieee802154_set(&dev->netdev, NETOPT_CHANNEL,
                           &chan, sizeof(chan));
     netdev_ieee802154_set(&dev->netdev, NETOPT_ADDRESS,