Use 'inline', not 'INLINE'.

Use 'inline', not 'INLINE'.

[ChangeLog]
* configure.in (INLINE): Remove.
[lib-src/ChangeLog]
* etags.c (hash): Now inline unconditionally.
* make-docfile.c (put_char): inline, not INLINE.
[nt/ChangeLog]
* config.nt (INLINE): Remove.
[src/ChangeLog]
<http://lists.gnu.org/archive/html/emacs-devel/2011-05/msg00914.html>
* alloc.c, fontset.c (INLINE): Remove.
* alloc.c, bidi.c, charset.c, coding.c, dispnew.c, fns.c, image.c:
* intervals.c, keyboard.c, process.c, syntax.c, textprop.c, w32term.c:
* xdisp.c, xfaces.c, xterm.c: Replace all uses of INLINE with inline.
* gmalloc.c (register_heapinfo): Use inline unconditionally.
* lisp.h (LISP_MAKE_RVALUE): Use inline, not __inline__.