x86: Simplify int128 target check

Since ia32 doesn't support int128, replace

/* { dg-do compile { target { int128 && { ! ia32 } } } } */

with

/* { dg-do compile { target int128 } } */

	* gcc.target/i386/apx-ndd-adc.c (dg-do): Replace
	"target { int128 && { ! ia32 } }" with "target int128".
	* gcc.target/i386/apx-ndd-sbb.c (dg-do): Likewise.
	* gcc.target/i386/apx-ndd-ti-shift.c (dg-do): Likewise.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>