perf/x86/intel: Apply the common initialization code for ADL

Use the intel_pmu_init_glc() and intel_pmu_init_grt() to replace the
duplicate code for ADL.

The current code already checks the PERF_X86_EVENT_TOPDOWN flag before
invoking the Topdown metrics functions. (The PERF_X86_EVENT_TOPDOWN flag
is to indicate the Topdown metric feature, which is only available for
the p-core.) Drop the unnecessary adl_set_topdown_event_period() and
adl_update_topdown_event().

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230829125806.3016082-5-kan.liang@linux.intel.com