net: wireless: bcmdhd: Add SUPPORT_PM2_ONLY option

Change-Id: Ieb2569cb7fb2bbc56ff9abbc8728a7741fda0027
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
net: wireless: bcmdhd: Enable SUPPORT_PM2_ONLY mode

Change-Id: I4f8132191454f0a12f7613388229fed9be5216c9
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>