c: Less warnings for parameters declared as arrays [PR98536]

To avoid false positivies, tune the warnings for parameters declared
as arrays with size expressions.  Do not warn when more bounds are
specified in the declaration than before.

	PR c/98536

gcc/c-family/:
	* c-warn.cc (warn_parm_array_mismatch): Do not warn if more
	bounds are specified.

gcc/testsuite:
	* gcc.dg/Wvla-parameter-4.c: Adapt test.
	* gcc.dg/attr-access-2.c: Adapt test.