Remove __P and P_ from .c and .m files and definition of P_

Remove __P and P_ from .c and .m files and definition of P_

* lisp.h:
* atimer.h: Remove define for P_.

* alloc.c: Remove __P and P_ from .c and .m files.
* atimer.c:
* buffer.c:
* callint.c:
* category.c:
* charset.c:
* chartab.c:
* cm.c:
* coding.c:
* composite.c:
* data.c:
* dired.c:
* dispnew.c:
* doc.c:
* editfns.c:
* emacs.c:
* eval.c:
* fileio.c:
* filelock.c:
* fns.c:
* font.c:
* fontset.c:
* frame.c:
* ftfont.c:
* ftxfont.c:
* gmalloc.c:
* gtkutil.c:
* image.c:
* indent.c:
* intervals.c:
* keyboard.c:
* keymap.c:
* lread.c:
* marker.c:
* menu.c:
* minibuf.c:
* print.c:
* process.c:
* scroll.c:
* search.c:
* sound.c:
* strftime.c:
* syntax.c:
* sysdep.c:
* term.c:
* terminal.c:
* textprop.c:
* unexalpha.c:
* w32console.c:
* w32fns.c:
* w32font.c:
* w32menu.c:
* w32term.c:
* w32uniscribe.c:
* window.c:
* xdisp.c:
* xfaces.c:
* xfns.c:
* xfont.c:
* xftfont.c:
* xmenu.c:
* xselect.c:
* xterm.c: Likewise.

* ebrowse.c: Remove P_ and __P.
* etags.c:
* movemail.c:
* pop.c:
* update-game-score.c: Likewise.