Revert "ext4: speed up truncate/unlink by not using bforget() unless needed"

This reverts commit ef21cb27d5e2f9d42ca3cfc250aab2baf12eaceb.
Just to be sure
config: enable CONFIG_LIB80211 and CONFIG_MAC80211

CONFIG_IKCONFIG enabled too, to get current .config file just do "zcat /proc/config.gz > /sdcard/config"

https://github.com/TeamCanjica/Samsung_STE_Kernel/commit/a101bbfc39b0d80c5dd5481b7b005fd64b197ec2