net: wireless: bcmdhd: Increase PNO wakelock to 7 sec

Change-Id: Ib4d51cb3ee1c117c645dda663e08a1ee5954c81c
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

Conflicts:

	drivers/net/wireless/bcmdhd/dhd_linux.c