lockref: uninline lockref helper functions

They aren't very good to inline, since they already call external
functions (the spinlock code), and we're going to create rather more
complicated versions of them that can do the reference count updates
locklessly.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc include/linux/lockref.h
Simple merge

diff --cc lib/Makefile
Simple merge

diff --cc lib/lockref.c
Simple merge