perf intel-pt: Use existing definitions of le16_to_cpu() etc

Use definitions from tools/include/linux/kernel.h

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20231005190451.175568-4-adrian.hunter@intel.com


Signed-off-by: Namhyung Kim <namhyung@kernel.org>