[qca-nss-ecm]: remove bridge postrouting hook from sfe frontend

Since sfe don't support bridge acceleration, so sfe frontend don't
need to register bridge postrouting hook.

Change-Id: Idaf1bb234089d4ba4440a850daa3336933d21bd1
Signed-off-by: Xiaoping Fan <xfan@codeaurora.org>
2 files changed