ath9k_hw: don't touch with treewide double semicolon removal

This is a partial revert of 6eab04a87677 ("treewide: remove extra
semicolons"). Wireless tree removes the code in question, so
drop the hunk to avoid conflict.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>