ath79-generic: migrate D-Link DIR-825 B1 from ar71xx

Signed-off-by: Sebastian Schaper <openwrt@sebastianschaper.net>

docs/user/supported_devices.rst

@@ -25,6 +25,7 @@ ath79-generic
   - DAP-2660 A1 [#lan_as_wan]_
   - DIR-505 A1 [#lan_as_wan]_
   - DIR-505 A2 [#lan_as_wan]_
+  - DIR-825 B1
 
 * Enterasys
 

targets/ath79-generic

@@ -83,6 +83,14 @@ device('d-link-dir-505', 'dlink_dir-505', {
 	},
 })
 
+device('d-link-dir825b1', 'dlink_dir-825-b1', {
+	factory = false,
+	class = 'tiny', -- Only 6M of usable Firmware space
+	manifest_aliases = {
+		'd-link-dir-825-rev-b1', -- Upgrade from OpenWrt 19.07
+	},
+})
+
 
 -- Enterasys