rs6000: Teach rs6000_opaque_type_invalid_use_p about inline asm [PR108272]

rs6000: Teach rs6000_opaque_type_invalid_use_p about inline asm [PR108272]

As PR108272 shows, there are some invalid uses of MMA opaque
types in inline asm statements.  This patch is to teach the
function rs6000_opaque_type_invalid_use_p for inline asm,
check and error any invalid use of MMA opaque types in input
and output operands.

	PR target/108272

gcc/ChangeLog:

	* config/rs6000/rs6000.cc (rs6000_opaque_type_invalid_use_p): Add the
	support for invalid uses in inline asm, factor out the checking and
	erroring to lambda function check_and_error_invalid_use.

gcc/testsuite/ChangeLog:

	* gcc.target/powerpc/pr108272-1.c: New test.
	* gcc.target/powerpc/pr108272-2.c: New test.
	* gcc.target/powerpc/pr108272-3.c: New test.
	* gcc.target/powerpc/pr108272-4.c: New test.