rs6000: Teach rs6000_opaque_type_invalid_use_p about gcall [PR108348]

rs6000: Teach rs6000_opaque_type_invalid_use_p about gcall [PR108348]

PR108348 shows one special case that MMA opaque types are
used in function arguments and treated as pass by reference,
it results in one copying from argument to a temp variable,
since this copying happens before rs6000_function_arg check,
it can cause ICE without MMA support then.  This patch is to
teach function rs6000_opaque_type_invalid_use_p to check if
any function argument in a gcall stmt has the invalid use of
MMA opaque types.

btw, I checked the handling on return value, it doesn't have
this kind of issue as its checking and error emission is quite
early, so this doesn't handle function return value.

	PR target/108348

gcc/ChangeLog:

	* config/rs6000/rs6000.c (rs6000_opaque_type_invalid_use_p): Add the
	support for invalid uses of MMA opaque type in function arguments.

gcc/testsuite/ChangeLog:

	* gcc.target/powerpc/pr108348-1.c: New test.
	* gcc.target/powerpc/pr108348-2.c: New test.

(cherry picked from commit 5d9529687deb9ed009361a16c02a7f6c3e2ebbf3)