wl12xx: add config_hangover command

Add wl12xx_acx_config_hangover() and respective conf values.
This command configures how long the chip will stay awake
after it was configured to enter psm.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

diff --cc drivers/net/wireless/wl12xx/acx.c
Simple merge

diff --cc drivers/net/wireless/wl12xx/acx.h
Simple merge

diff --cc drivers/net/wireless/wl12xx/conf.h
Simple merge

diff --cc drivers/net/wireless/wl12xx/init.c
Simple merge

diff --cc drivers/net/wireless/wl12xx/main.c
Simple merge