msm: wlan: Correct db.txt entries

Countries AU, AR and CA follow FCC6 for AP. Correct their
entries to reflect that. Also KR follows APl9 for AP.
So correct that entry too. Also correct the entry for PS,
US public safety and China, CN.

Change-Id: Id384f7ded0366634e25aad2eb0f4689e25e7333e
CRs-Fixed: 725522
Signed-off-by: Amar Singhal <asinghal@codeaurora.org>