ath9k_hw: update initvals for AR9003

This synchs up the initvals to the values used on the
Atheros HAL for AR9003. This specific change adds support
for a new high power module.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>