drivers: rmnet_shs: Fast deliver non UDP/TCP packets

Ignore non UDP/TCP packets that enter rmnet_shs. Deliver
immediately and don't steer those packets.

CRs-Fixed: 2340160
Acked-by: Raul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>