[openwrt/openwrt] wifi-scripts: ucode: add support for the legacy hwmode option

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/ce3ab2646b1e1f14f1d7d4d67698bd7fd85c821f

commit ce3ab2646b1e1f14f1d7d4d67698bd7fd85c821f
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Thu Sep 25 09:40:47 2025 +0200

    wifi-scripts: ucode: add support for the legacy hwmode option
    
    Some configs that are many years old still have it set instead of band
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 .../files-ucode/lib/netifd/wireless/mac80211.sh    | 25 +++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/package/network/config/wifi-scripts/files-ucode/lib/netifd/wireless/mac80211.sh b/package/network/config/wifi-scripts/files-ucode/lib/netifd/wireless/mac80211.sh
index ab8b2d15f9..7acff9be8f 100755
--- a/package/network/config/wifi-scripts/files-ucode/lib/netifd/wireless/mac80211.sh
+++ b/package/network/config/wifi-scripts/files-ucode/lib/netifd/wireless/mac80211.sh
@@ -175,7 +175,30 @@ function setup() {
 
 	log('Starting');
 
-	validate('device', data.config);
+	let config = data.config;
+
+	if (!config.band) {
+		switch (config.hwmode) {
+		case 'a':
+		case '11a':
+			config.band = '5g';
+			break;
+		case 'ad':
+		case '11ad':
+			config.band = '60g';
+			break;
+		case 'b':
+		case 'g':
+		case '11b':
+		case '11g':
+		default:
+			config.band = '2g';
+			break;
+		}
+	}
+	delete config.hwmode;
+
+	validate('device', config);
 	setup_phy(data.phy, data.config, data.data);
 
 	let supplicant_mesh;