Starting Kernel 4.19 IPA LAN RX supports NAPI polling
mechanism. Netdevs that hook into IPA need to call
netif_receive_skb() or similar to deliver the packet
to network stack instead of using netif_rx_ni().
IPA driver exports ipa_get_lan_rx_napi(void) API for
this purpose. If this API call returns true use
netif_receive_skb() or fallback on legacy api.
Add the changes under a feature flag IPA_LAN_RX_NAPI_SUPPORT
which is enabled under a linux kernel version check for 4.19
and above.
Change-Id: I449404e86e934fd6113cb71e494575e67602f678
CRs-Fixed: 2588500
7e8f67cfca