Currently, host driver picks minimum of the self and AP's NSS
capability at the time of join. Host driver sends the same to
firmware through vdev_start. But APs may upgrade NSS to higher
value during connect. As the NSS is already limited to min at
the time of join, STA is not able to use full capability and
connection also happens with min capability.
So, send self max NSS capability to firmware via vdev_start and
final value(min of self and AP's cap) is sent to firmware
through peer_assoc.
Also, cleanup the ini gActionOUIForceMaxNss as it's no
longer needed.
Change-Id: I0555059d03c77e55a4ccf1543e709904e6ea4e49
CRs-Fixed: 3615495
01a957e561