ath9k_hw: rename ath9k_hw_rf_free() to ath9k_hw_rf_free_ext_banks()

This clarifies this is only required for external radios.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
4 files changed