[qca-nss-drv] Add new message type to request conn stats from FW

A new message type is added to request connection stats from FW.
The message may be larger then the ipv4/ipv6_msg so the caller
need to specify the actual size of the msg so ipv4/ipv6_tx can
allocate buffer that is large enough to carry this msg

Change-Id: Ia99ff4e3e42c669bf49aba630eb6f9dadb68d0c3
Signed-off-by: Stephen Wang <wstephen@codeaurora.org>
4 files changed