wireless-regdb: Update regulatory rules for Japan (JP) on 5GHz

Support 144ch for JP Region.

The Ministry of Internal Affairs and Communications has approved 144ch in Japan.

Source: https://www.soumu.go.jp/main_content/000635492.pdf

Signed-off-by: CaffeeLake <PascalCoffeeLake@gmail.com>
Signed-off-by: Seth Forshee <sforshee@kernel.org>
diff --git a/db.txt b/db.txt
index 012824f..8b3827a 100644
--- a/db.txt
+++ b/db.txt
@@ -907,13 +907,15 @@
 	(5170 - 5250 @ 80), (23)
 	(5735 - 5835 @ 80), (23)
 
+# Source:
+# https://www.soumu.go.jp/main_content/000635492.pdf
 country JP: DFS-JP
 	(2402 - 2482 @ 40), (20)
 	(2474 - 2494 @ 20), (20), NO-OFDM
 	(4910 - 4990 @ 40), (23)
 	(5170 - 5250 @ 80), (20), AUTO-BW
 	(5250 - 5330 @ 80), (20), DFS, AUTO-BW
-	(5490 - 5710 @ 160), (23), DFS
+	(5490 - 5730 @ 160), (23), DFS
 	# 60 GHz band channels 2-4 at 10mW,
 	# ref: http://www.arib.or.jp/english/html/overview/doc/1-STD-T74v1_1.pdf
 	(57000 - 66000 @ 2160), (10 mW)