* config/arm/arm.c, config/arm/thumb2.md, config/m68k/m68k.c,
	config/spu/spu.c, omega.h, passes.c, predict.c: Fix comment
	typos.
	* doc/cpp.texi, doc/extend.texi, doc/invoke.texi: Fix typos.
	Follow spelling conventions.

From-SVN: r123025