gas: x86: ginsn: adapt the APX insn handling

A review comment on the SCFI V4 series was to bail out on APX
instructions differently:

Currently, GAS bails out at the mere sight of an APX instruction when
--scfi=experimental is in effect; this is implemented in form of an
early exit from x86_ginsn_new ().  It is preferable to not have to
handle APX instructions explicitly like that with an early exit,
but rather to use the existing infrastructure in the x86_ginsn_new ()
function to bail out only if the APX insn affects SCFI correctness.

FIXME -
1. There remains an outstanding issue with adcx etc ops
2. Add tests once above is fixed

gas/
	* config/tc-i386.c (ginsn_opsize_prefix_p): Rename and adjust to
	be ginsn_implicitstackop_opsize16_p instead.
	(x86_ginsn_enter): Use the new function.
	(x86_ginsn_leave): Likewise.
	(x86_ginsn_new): Likewise.  Also remove the stub for early exit
	for APX instructions.

gas/testsuite/
        * gas/scfi/x86_64/scfi-unsupported-insn-1.l:

0 files changed, 0 insertions, 0 deletions