Fix ah_powerMode to be set at the correct place for the AR5210.

Tested:

* AR5210, STA mode
Fix the AR5210 HAL code to store the association ID and restore it
upon reset.

Tested:

* AR5210, STA mode
Fix the AR5211 power mode tracking stuff.

Tested:

* AR5211, STA mode
Modify the ioctl path to support querying things if the vap state is
SLEEP rather than RUN.

Without this things like 'ifconfig wlan0 list sta' don't work when the
NIC is power save.

Tested:

* AR5212, STA mode (with powersave)
* AR5416, STA mode (with powersave)
Use MK_OPENLDAP in preference to WITH_OPENLDAP and make it a default
NO option to match the opt-in nature of the historical nature of this
option.
Add option WITHOUT_VI to not build/install vi. vi was the largest
binary without a knob to turn it off.