net: wireless: bcmdhd: add nvidia fixes on latest driver from st8 branch

net: wireless: bcmdhd: add nvidia fixes on latest driver from st8 branch

- reorder sdlock to avoid lockup
- add driver command MKEEP_ALIVE
- reduce tasklet priority
- update cfg layer with active channel list
- set p2p bw 20MHz if wlan0 is on 20MHz

bug 200037988

Change-Id: I96565fdd61309e5d4ea94d6a96b5a2c03a061d8d
Signed-off-by: Manikanta <mmaddireddy@nvidia.com>
Reviewed-on: http://git-master/r/553602
Reviewed-by: Mohan Thadikamalla <mohant@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>