qeth: remove extraneous length from %pM format

Length specifier in the %pM format is not supported (at least, not
documented). Remove it, and also an extraneous '&' for the array.

Signed-off-by: Eugene Crosser <[e-mail]>
Signed-off-by: Ursula Braun <[e-mail]>
Suggested-by: Joe Perches <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/s390/net/qeth_l2_main.c

···
 			env[i] = str[i]; i++;
 		}
 		if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
-			snprintf(str[i], sizeof(str[i]), "MAC=%pM6",
-				&addr_lnid->mac);
+			snprintf(str[i], sizeof(str[i]), "MAC=%pM",
+				 addr_lnid->mac);
 			env[i] = str[i]; i++;
 		}
 		snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",