[atl1e] Fix compilation on gcc-4.4.1-2.fc11.i586.

Error message was:

[BUILD] bin/atl1e.oncc1: warnings being treated as errors
drivers/net/atl1e.c: In function 'atl1e_get_permanent_address':
drivers/net/atl1e.c:1326: error: dereferencing type-punned pointer will break strict-aliasing rules
make: *** [bin/atl1e.o] Error 1

Reported-by: Giandomenico  De Tullio <ghisha@email.it>
Signed-off-by: Michael Brown <mcb30@etherboot.org>
Modified-by: Michael Brown <mcb30@etherboot.org>

src/drivers/net/atl1e.c

@@ -1296,14 +1296,14 @@ void atl1e_hw_set_mac_addr(struct atl1e_hw *hw)
  */
 static int atl1e_get_permanent_address(struct atl1e_hw *hw)
 {
-	u32 addr[2];
+	union {
+		u32 dword[2];
+		u8 byte[8];
+	} hw_addr;
 	u32 i;
 	u32 twsi_ctrl_data;
 	u8  eth_addr[ETH_ALEN];
 
-	/* init */
-	addr[0] = addr[1] = 0;
-
 	if (!atl1e_check_eeprom_exist(hw)) {
 		/* eeprom exist */
 		twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
@@ -1320,10 +1320,11 @@ static int atl1e_get_permanent_address(struct atl1e_hw *hw)
 	}
 
 	/* maybe MAC-address is from BIOS */
-	addr[0] = AT_READ_REG(hw, REG_MAC_STA_ADDR);
-	addr[1] = AT_READ_REG(hw, REG_MAC_STA_ADDR + 4);
-	*(u32 *) &eth_addr[2] = swap32(addr[0]);
-	*(u16 *) &eth_addr[0] = swap16(*(u16 *)&addr[1]);
+	hw_addr.dword[0] = AT_READ_REG(hw, REG_MAC_STA_ADDR);
+	hw_addr.dword[1] = AT_READ_REG(hw, REG_MAC_STA_ADDR + 4);
+	for (i = 0; i < ETH_ALEN; i++) {
+		eth_addr[ETH_ALEN - i - 1] = hw_addr.byte[i];
+	}
 
 	memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
 	return 0;