perf/x86/intel: Add Rocket Lake CPU support

From the perspective of Intel PMU, Rocket Lake is the same as Ice Lake
and Tiger Lake. Share the perf code with them.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201019153528.13850-1-kan.liang@linux.intel.com