[qca-nss-sfe] Bypass MTU check before calling udp tunnel decap

This fixes TCP traffic acceleration issue in vxlan and l2tp.
MTU check is not needed in the SFE Decap process since it is on RX path.

Change-Id: I02821b82bd843e6e09ccfa1cd888e9a0a118cdd7
Signed-off-by: Ken Zhu <quic_guigenz@quicinc.com>
2 files changed