net: wireless: bcmdhd: Close p2p0 device in wl_down

Change-Id: I9e8404badf55c0e7a54144d7b5f1c5d80aa0cb4b
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
net: wireless: bcmdhd: Update to version 1.88.21

- Remove DHCP_SCAN_SUPPRESS option
- Tune P2P parameters
- Add bcm4339 support

Change-Id: Ifc2906b3df6c17a7a8ea8e27f5f001fe3d9acd01
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

Conflicts:
	drivers/net/wireless/bcmdhd/dhd_linux.c