ath9k: fix compile error without debug enabled

commits 8e6f5aa250d6013ec0d66f9f45f376678d3fc4ab and
db1a052b73f7c97f9e8b21f3f19a92313ed2acb1 accidentally introduced
compile errors that happens when ath9k debug is not enabled.
This patch fixes the declaration of the inline stubs to resolve this.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
1 file changed