staging: vt6655: Use ether_addr_copy function

This patch fixes the following checkpatch.pl warnings:
WARNING: "Prefer ether_addr_copy() over memcpy() if the Ethernet
addresses are __aligned(2)" in file key.c
Pahole shows that the addresses are aligned
Signed-off-by: Dilek Uzulmez <dilekuzulmez@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/key.c

@@ -267,7 +267,7 @@ bool KeybSetKey(
 		}
 	}
 	if (j < (MAX_KEY_TABLE-1)) {
-		memcpy(pTable->KeyTable[j].abyBSSID, pbyBSSID, ETH_ALEN);
+		ether_addr_copy(pTable->KeyTable[j].abyBSSID, pbyBSSID);
 		pTable->KeyTable[j].bInUse = true;
 		if ((dwKeyIndex & PAIRWISE_KEY) != 0)  {
 			// Pairwise key