Fix two inconsistencies in feature names as discussed in [1]:

1. Rename "dwarf-unwind-support" to "dwarf-unwind"

2. 'get_cpuid' feature and 'HAVE_AUXTRACE_SUPPORT' names don't
   look related, change the feature name to 'auxtrace' to match the
   macro name, as 'get_cpuid' string is not used anywhere to check the
   feature presence

[1]: https://lore.kernel.org/linux-perf-users/ZoRw5we4HLSTZND6@x1/Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Aditya Gupta <adityag@linux.ibm.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Disha Goel <disgoel@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240904190132.415212-7-adityag@linux.ibm.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>