ext4: add tag2str definition that was dropped by a buggy merge

Add back tag2str() function definition that was accidentally dropped
by a buggy kernel merge. This code gets called if CONFIG_JBD2_DEBUG is
enabled.

Fixes: a782ca0441cd4d2658b729733623d5e3e39267ed
BUG=b/190796316
TEST=Compiled locally with this option turned on

Change-Id: I0c06a484d131124676f1a26d869e0611593e5dd0
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/17950
Tested-by: Harshad Shirwadkar <harshads@google.com>
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
1 file changed