perf bench breakpoint: Fix build on 32-bit arches

perf bench breakpoint: Fix build on 32-bit arches

Cast pointers to unsigned long instead of to uint64_t to avoid this
problem on 32-bit arches:

  31     6.89 debian:experimental-x-mips    : FAIL gcc version 11.2.0 (Debian 11.2.0-18)
    bench/breakpoint.c: In function 'breakpoint_setup':
    bench/breakpoint.c:56:24: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
       56 |         attr.bp_addr = (uint64_t)addr;
          |                        ^
    cc1: all warnings being treated as errors
    make[3]: *** [/git/perf-5.18.0-rc7/tools/build/Makefile.build:139: bench] Error 2

Fixes: 68a6772f11dbb1ed ("perf bench: Add breakpoint benchmarks")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/YoLq1nHx1doi+VWl@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>