Enable MGLRU

https://www.phoronix.com/news/MGLRU-Reaches-mm-stable
By cummunity request #214 (comment)

Author: 13r0ck

debian.master/config/config.common.ubuntu

@@ -6067,7 +6067,7 @@ CONFIG_LPARCFG=y
 # CONFIG_LP_CONSOLE is not set
 CONFIG_LRU_CACHE=m
 CONFIG_LRU_GEN=y
-# CONFIG_LRU_GEN_ENABLED is not set
+CONFIG_LRU_GEN_ENABLED=y
 # CONFIG_LRU_GEN_STATS is not set
 CONFIG_LSI_ET1011C_PHY=m
 CONFIG_LSM="landlock,lockdown,yama,integrity,apparmor"