ath5k: update 5210/5211 frame types

Update 5210 frame types to match the HAL. We have to apply the same bitshift to
the constants as we use later.

Add 5211 specific frame types.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>