gensupport.c (n_comma_elts): Moved here from genattrtab.c.

	* gensupport.c (n_comma_elts): Moved here from genattrtab.c.
	(scan_comma_elt): New function.  Accepts whitespace in comma lists.
	* gensupport.h: Prototype new routines.
	* genattr.c (gen_attr): Use scan_comma_elt.  Avoid unnecessary
	use of printf.
	* genattrtab.c (n_comma_elts): Moved to gensupport.c.
	(next_comma_elt): Use scan_comma_elt.

	* config/i386/i386.md: Use new attribute notation to break up
	long lines in define_attr forms.

From-SVN: r53403