net: qualcomm: rmnet: shs deliver return

SHS skb responsibility changed to also deliver packets to
network stack. Previously SHS would modify packets in
orginal data path, now it will branch off and be in charge
of calling netif_receive_skb

Change-Id: Ieec44f6cddc5d2cef429d9944ff90b1558cd2dda
Acked-by: Raul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: Conner Huff <chuff@codeaurora.org>