amdgcn: Implement -msram-ecc=any

amdgcn: Implement -msram-ecc=any

The option was already there, but just an alias for -msram-ecc=on.  Now that
LLVM13 supports HSACOv4 and the new ELF flags I can implement the option
properly.

The "any" option is the default in order to ensure that library files work
whichever way the user wants, which means we won't need multilibs to support
the different SRAM ECC hardware configurations.

gcc/ChangeLog:

	* config/gcn/gcn-hsa.h (SRAMOPT): Include the whole option string.
	Adjust for new -msram-ecc=any behaviour.
	(ASM_SPEC): Adjust -mxnack and -msram-ecc usage.
	* config/gcn/gcn.c (output_file_start): Implement -msram-ecc=any.
	* config/gcn/mkoffload.c (EF_AMDGPU_XNACK): Rename to ...
	(EF_AMDGPU_XNACK_V3): ... this.
	(EF_AMDGPU_SRAM_ECC): Rename to ...
	(EF_AMDGPU_SRAM_ECC_V3): ... this.
	(EF_AMDGPU_FEATURE_XNACK_V4): New.
	(EF_AMDGPU_FEATURE_XNACK_UNSUPPORTED_V4): New.
	(EF_AMDGPU_FEATURE_XNACK_ANY_V4): New.
	(EF_AMDGPU_FEATURE_XNACK_OFF_V4): New.
	(EF_AMDGPU_FEATURE_XNACK_ON_V4): New.
	(EF_AMDGPU_FEATURE_SRAMECC_V4): New.
	(EF_AMDGPU_FEATURE_SRAMECC_UNSUPPORTED_V4): New.
	(EF_AMDGPU_FEATURE_SRAMECC_ANY_V4): New.
	(EF_AMDGPU_FEATURE_SRAMECC_OFF_V4): New.
	(EF_AMDGPU_FEATURE_SRAMECC_ON_V4): New.
	(SET_XNACK_ON): New.
	(SET_XNACK_OFF): New.
	(TEST_XNACK): New.
	(SET_SRAM_ECC_ON): New.
	(SET_SRAM_ECC_ANY): New.
	(SET_SRAM_ECC_OFF): New.
	(TEST_SRAM_ECC_ANY): New.
	(TEST_SRAM_ECC_ON): New.
	(main): Implement HSACOv4 and -msram-ecc=any.