net: wireless: bcmdhd: Add SAR support

Change-Id: I11c3fbf3ecdb5c544221d4530c9c610f647fb1b7
Signed-off-by: Ecco park <eccopark@broadcom.com>
net: wireless: bcmdhd: Do not reset nvram_path if it was set

Change-Id: I62bacd84b551f115e69d523ca662d56c7cb78dbe
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>