After a bit of a prod from Hans...

Make the obvious change to these tests to get them passing again on m68k.

	PR testsuite/118055

gcc/testsuite

	* gcc.dg/tree-ssa/pr83403-1.c: Add m68k*-*-* to targets needing
	additional arguments for peeling.
	* gcc.dg/tree-ssa/pr83403-2.c: Similarly.