perf/x86/intel: Fix the comment about guest LBR support on KVM

Starting from v5.12, KVM reports guest LBR and extra_regs support
when the host has relevant support. Just delete this part of the
comment and fix a typo incidentally.

Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: NKan Liang <kan.liang@linux.intel.com>
Reviewed-by: NAndi Kleen <ak@linux.intel.com>
Signed-off-by: NLike Xu <like.xu@linux.intel.com>
Signed-off-by: NYang Weijiang <weijiang.yang@intel.com>
Message-Id: <20220517154100.29983-2-weijiang.yang@intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/events/intel/core.c

@@ -6501,8 +6501,7 @@ __init int intel_pmu_init(void)
 					  x86_pmu.intel_ctrl);
 	/*
 	 * Access LBR MSR may cause #GP under certain circumstances.
-	 * E.g. KVM doesn't support LBR MSR
-	 * Check all LBT MSR here.
+	 * Check all LBR MSR here.
 	 * Disable LBR access if any LBR MSRs can not be accessed.
 	 */
 	if (x86_pmu.lbr_tos && !check_msr(x86_pmu.lbr_tos, 0x3UL))