ath9k_htc: Remove AR7010 v1.0 support

All the AR7010 devices supoprted by ath9k_htc are based
on version v1.1, so remove support for v1.0.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>