list: change list_for_each_entry*() to use list_*_entry()

list: change list_for_each_entry*() to use list_*_entry()

Now that we have list_{next,prev}_entry() we can change
list_for_each_entry*() and list_safe_reset_next() to use the new helpers
to improve the readability.

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: Eilon Greenstein <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>