Revert "ar71xx-generic: unmark archer-c25-v1 as broken"

This reverts commit fb08e104.

Devices featuring ath10k radios should at least 128 MB of memory
as their driver is quite memory hungry.

Devices with a configuration (1x ath10k, 64M memory) like this have
often been seen as running out of memory.

targets/ar71xx-generic

@@ -296,6 +296,7 @@ device('tp-link-archer-c7-v5', 'archer-c7-v5', {
 
 device('tp-link-archer-c25-v1', 'archer-c25-v1', {
 	packages = ATH10K_PACKAGES_QCA9887,
+	broken = true, -- OOM with 5GHz enabled in most environments
 })
 
 device('tp-link-archer-c58-v1', 'archer-c58-v1', {