ath9k: Return early for invalid rates

Process and update the internal RSSI average, which
is used by ANI, after verifying that the received
frame has valid rate information.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
1 file changed