mm: remove remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc mm/slab.c
Simple merge

diff --cc mm/sparse.c
Simple merge

diff --cc mm/vmscan.c
Simple merge