[PATCH v2] wireless-regdb: Update 6 GHz rules for South Korea (KR)

[Louis Kotze <loukot@gmail.com>]

MSIT Announcement No. 2026-9 (February 10, 2026) revised the power
limits for 6 GHz indoor WLAN:

  Lower band (5925-6425 MHz): 1 W (30 dBm) EIRP, indoor
  Upper band (6425-7125 MHz): 500 mW (27 dBm) EIRP, indoor

The previous entry used a single rule covering 5925-7125 MHz at
15 dBm, which does not reflect either the current lower or upper
band limits.

Split into two frequency ranges so that devices operating in the
lower band can use the higher power limit. Add AUTO-BW to both
ranges so the kernel knows they can be combined.

MSIT Announcement No. 2024-22 (May 30, 2024) sets the maximum
occupied bandwidth to 320 MHz for both indoor and VLP categories.

Reference:
MSIT Announcement No. 2026-9 (power limits)
https://www.msit.go.kr/bbs/view.do?sCode=user&mId=108&mPid=103&bbsSeqNo=83&nttSeqNo=3186355
MSIT Announcement No. 2024-22 (technical standards, bandwidth)
https://www.msit.go.kr/bbs/view.do?sCode=user&mId=108&mPid=103&bbsSeqNo=83&nttSeqNo=3175810

Signed-off-by: Louis Kotze <loukot@gmail.com>
---
Changes since v1:
  - Split into two frequency ranges with AUTO-BW per Chen-Yu Tsai
    review, instead of a single conservative rule at 27 dBm.
  - Add MSIT 2026-9 as primary reference for power limits (replacing
    CAICT secondary source).
  - Add MSIT 2024-22 as primary reference for 320 MHz bandwidth.
  - Send as standalone patch rather than part of 5-patch series.

v1: https://lore.kernel.org/wireless-regdb/20260411222155.299441-3-loukot@gmail.com/

 db.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/db.txt b/db.txt
index 343b256..6b56ddd 100644
--- a/db.txt
+++ b/db.txt
@@ -1136,7 +1136,8 @@ country KR: DFS-JP
 	(5470 - 5725 @ 160), (20), DFS
 	(5725 - 5850 @ 80), (23)
 	# 6 GHz band
-	(5925 - 7125 @ 160), (15), NO-OUTDOOR
+	(5925 - 6425 @ 320), (30), NO-OUTDOOR, AUTO-BW
+	(6425 - 7125 @ 320), (27), NO-OUTDOOR, AUTO-BW
 	# 60 GHz band channels 1-4
 	(57000 - 66000 @ 2160), (43)

--
2.53.0