UPSTREAM: KVM: arm64: Wrapper for getting pmu_events

Eases migrating away from using hyp data and simplifies the code.

No functional change intended.

Reviewed-by: Oliver Upton <oupton@google.com>
Signed-off-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220510095710.148178-2-tabba@google.com


(cherry picked from commit 3cb8a091)
Signed-off-by: Will Deacon <willdeacon@google.com>
Bug: 233587962
Bug: 233588291
Change-Id: Ie9710e658a6e4def91f9e4181df7f4b70ec13e9a