wireless-regdb: add 30dbm wireless signal for CN/US region

package/firmware/wireless-regdb/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=wireless-regdb
 PKG_VERSION:=2021.04.21
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@KERNEL/software/network/wireless-regdb/

package/firmware/wireless-regdb/patches/600-custom-fix-txpower-and-dfs.patch

@@ -0,0 +1,32 @@
+--- a/db.txt
++++ b/db.txt
+@@ -347,9 +347,9 @@ country CL: DFS-JP
+ 	(5735 - 5835 @ 80), (20)
+ 
+ country CN: DFS-FCC
+-	(2402 - 2482 @ 40), (20)
+-	(5170 - 5250 @ 80), (23), AUTO-BW
+-	(5250 - 5330 @ 80), (23), DFS, AUTO-BW
++	(2402 - 2482 @ 40), (30)
++	(5170 - 5250 @ 80), (30), AUTO-BW
++	(5250 - 5330 @ 80), (30), AUTO-BW
+ 	(5735 - 5835 @ 80), (30)
+ 	# 60 GHz band channels 1,4: 28dBm, channels 2,3: 44dBm
+ 	# ref: http://www.miit.gov.cn/n11293472/n11505629/n11506593/n11960250/n11960606/n11960700/n12330791.files/n12330790.pdf
+@@ -1580,13 +1580,13 @@ country UG: DFS-FCC
+ country US: DFS-FCC
+ 	(2400 - 2483.5 @ 40), (30)
+ 	# 5.15 ~ 5.25 GHz: 30 dBm for master mode, 23 dBm for clients
+-	(5150 - 5250 @ 80), (23), AUTO-BW
+-	(5250 - 5350 @ 80), (23), DFS, AUTO-BW
++	(5150 - 5250 @ 80), (30), AUTO-BW
++	(5250 - 5350 @ 80), (30), AUTO-BW
+ 	# This range ends at 5725 MHz, but channel 144 extends to 5730 MHz.
+ 	# Since 5725 ~ 5730 MHz belongs to the next range which has looser
+ 	# requirements, we can extend the range by 5 MHz to make the kernel
+ 	# happy and be able to use channel 144.
+-	(5470 - 5730 @ 160), (23), DFS
++	(5470 - 5730 @ 160), (30)
+ 	(5730 - 5850 @ 80), (30)
+ 	# 60g band
+ 	# reference: section IV-D https://docs.fcc.gov/public/attachments/FCC-16-89A1.pdf