Add power11 aux vector and tests.

Add power11 aux vector and tests.

2024-02-15  Michael Meissner  <meissner@linux.ibm.com>

gcc/

	* config/rs6000/driver-rs6000.c (asm_names): Add power11 support.
	* config/rs6000/ppc-auxv.h (PPC_PLATFORM_POWER10): Remove comment saying
	this is not yet official.
	(PPC_PLATFORM_POWER11): Add power11 support.
	* config/rs6000/rs6000-builtin.cc (cpu_is_info): Likewise.

gcc/testsuite/

	* lib/target-support.exp (check_effective_target_power11_ok): Add
	power11 support.
	* gcc.target/powerpc/power11-1.c: New test.
	* gcc.target/powerpc/power11-2.c: Likewise.
	* gcc.target/powerpc/power11-3.c: Likewise.