[PATCH v3] wireless-regdb: Update regulatory rules for South Korea (KR)

[Sungbo Eo <mans0n@gorani.run>]

This patch is based on MSIT Public Notification 2021-86 ("Unlicensed Radio
Equipment Established Without Notice"), officially announced on 2021-11-29.

The PSD must not exceed 2.5 mW/MHz if the frequency range includes all or
part of 5230-5250 MHz and the bandwidth is equal to or less than 40 MHz.
This leads to the following:
* 5230-5250 @ 20 -> 17 dBm
* 5210-5250 @ 40 -> 20 dBm
Here the power limits for 80/160 MHz bandwidth are also lowered to 17/20 dBm,
as it's not possible to set different power limits for different bandwidths
at the moment.

Extend the last 5 GHz frequency range to 5850 MHz.

WiFi 6E is now allowed with the following restrictions:
* Indoor: the full 1.2 GHz range, up to 160 MHz bandwidth and 2 dBm/MHz PSD
* Outdoor: the lower 500 MHz range, up to 160 MHz bandwidth and 25 mW EIRP
Here only the latter entry is added.

And also update the regulatory source links.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>
---
v3:
* update regulatory source to newer revision
* replace "indoor only" 6E rule with "both indoor and outdoor" rule
  as "indoor only" rule limits PSD instead of EIRP

v2:
* split 5150-5250 MHz band rule to accommodate the PSD limit
* remove AUTO-BW flag from 6 GHz band rule
---
 db.txt | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/db.txt b/db.txt
index b898799..9be03ee 100644
--- a/db.txt
+++ b/db.txt
@@ -862,15 +862,22 @@ country KP: DFS-JP
 	(5490 - 5630 @ 20), (30), DFS
 	(5735 - 5815 @ 20), (30)
 
+# Source:
+# https://www.law.go.kr/LSW//admRulLsInfoP.do?chrClsCd=&admRulSeq=2100000205195
+# https://www.law.go.kr/LSW//admRulLsInfoP.do?chrClsCd=&admRulSeq=2100000205187
+# https://www.law.go.kr/LSW//admRulLsInfoP.do?chrClsCd=&admRulSeq=2100000206568
 country KR: DFS-JP
-	# ref: https://www.rra.go.kr
 	(2400 - 2483.5 @ 40), (23)
-	(5150 - 5250 @ 80), (23), AUTO-BW
+	(5150 - 5210 @ 40), (23), AUTO-BW
+	# max. PSD 2.5 mW/MHz in 5230-5250 MHz frequency range
+	(5210 - 5230 @ 20), (20), AUTO-BW
+	(5230 - 5250 @ 20), (17), AUTO-BW
 	(5250 - 5350 @ 80), (20), DFS, AUTO-BW
 	(5470 - 5725 @ 160), (20), DFS
-	(5725 - 5835 @ 80), (23)
-	# 60 GHz band channels 1-4,
-	# ref: http://www.law.go.kr/%ED%96%89%EC%A0%95%EA%B7%9C%EC%B9%99/%EB%AC%B4%EC%84%A0%EC%84%A4%EB%B9%84%EA%B7%9C%EC%B9%99
+	(5725 - 5850 @ 80), (23)
+	# 6 GHz band
+	(5925 - 6425 @ 160), (14)
+	# 60 GHz band channels 1-4
 	(57000 - 66000 @ 2160), (43)
 
 country KW: DFS-ETSI
-- 
2.34.1