configs: enable CONFIG_BLK_DEBUG_FS by default

This is useful for getting block layer debugging information in debugfs,
also our io hang check feature depends on it.
Signed-off-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

config-4.19.y-x86_64

@@ -820,7 +820,7 @@ CONFIG_BLK_DEV_THROTTLING=y
 # CONFIG_BLK_WBT is not set
 # CONFIG_BLK_CGROUP_IOLATENCY is not set
 CONFIG_BLK_CGROUP_IOCOST=y
-# CONFIG_BLK_DEBUG_FS is not set
+CONFIG_BLK_DEBUG_FS=y
 # CONFIG_BLK_SED_OPAL is not set
 
 #

config-4.19.y-x86_64-debug

@@ -824,7 +824,7 @@ CONFIG_BLK_DEV_THROTTLING=y
 # CONFIG_BLK_WBT is not set
 # CONFIG_BLK_CGROUP_IOLATENCY is not set
 CONFIG_BLK_CGROUP_IOCOST=y
-# CONFIG_BLK_DEBUG_FS is not set
+CONFIG_BLK_DEBUG_FS=y
 # CONFIG_BLK_SED_OPAL is not set
 
 #