Update build.config

Author: filkint

build.config

@@ -2,7 +2,7 @@
 CONFIG_VENDOR=ASUS
 CONFIG_PRODUCT=MT7620
 
-### Target ProductID (board select, max 12 symbols)
+### Target ProductID (board select, max 23 ASCII symbols)
 CONFIG_FIRMWARE_PRODUCT_ID="RT-AC51U"
 
 ############################################################
@@ -284,7 +284,7 @@ CONFIG_FIRMWARE_INCLUDE_LUA=y
 CONFIG_FIRMWARE_INCLUDE_EOIP=y
 
 ### Include KMS Activation support ~0.06MB
-#CONFIG_FIRMWARE_INCLUDE_VLMCSD=y
+CONFIG_FIRMWARE_INCLUDE_VLMCSD=y
 
 ### Include iPerf3 support ~0.13MB
 #CONFIG_FIRMWARE_INCLUDE_IPERF3=y
@@ -294,3 +294,4 @@ CONFIG_FIRMWARE_INCLUDE_NFQWS=y
 
 ### Reduce trx image size
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+