Revert "drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit"

Revert "drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit"

This reverts commit 15eff7d75a03
("drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit").

1. This commit is incorrect. "__skb_pad" will NOT free the skb on
failure when its "free_on_error" parameter is "false".

2. This commit claims to fix my commit. But it didn't CC me??

Fixes: 15eff7d75a03 ("drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit")
Cc: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>