drivers: shs: add shared memory file for net devices

Add a shared memory file for net devices. This is an array of
net device names, ip mismatches, and coalesced rx_pkts. Also passes
UDP and TCP tput numbers and buffer usage stats per netdev.

Change-Id: If68288e7628a06a0d5f61a8fa318f691ed600196
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>