extend.texi (PowerPC AltiVec Built-in Functions Available on ISA 2.07): Correct spell...

extend.texi (PowerPC AltiVec Built-in Functions Available on ISA 2.07): Correct spelling of bcdsub to be __builtin_bcdsub.

gcc/ChangeLog:

2018-08-09  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	* doc/extend.texi (PowerPC AltiVec Built-in Functions Available on
	ISA 2.07): Correct spelling of bcdsub to be __builtin_bcdsub.  Add
	third argument of type "const signed char" to descriptions of
	__builtin_bcdadd, __builtin_bcdadd_lt, __builtin_bcdadd_eq,
	__builtin_bcdadd_gt, __builtin_bcdadd_ov, __builtin_bcdsub,
	__builtin_bcdsub_lt, __builtin_bcdsub_eq, __builtin_bcdsub_gt,
	__builtin_bcdsub_ov functions.

From-SVN: r263449