cpupower: Add Georgian translation to Makefile LANGUAGES

Commit 4680b734 ("cpupower: Add Georgian translation") added
new language support. This change didn't add "ka" to Makefile
LANGUAGES variable. Add it now.

Reported-by: Temuri Doghonadze <temuri.doghonadze@gmail.com>
Reported-by: Zurab Kargareteli <zuraxt@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>