KVM: arm64: Repack struct kvm_pmu to reduce size

struct kvm_pmu has 2 holes using 10 bytes. This is instantiated
in all vcpus, so it adds up. Repack the structures to remove the
holes.

No functional change intended.

Reviewed-by: Oliver Upton <[e-mail]>
Signed-off-by: Fuad Tabba <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

include/kvm/arm_pmu.h

···
 };
 
 struct kvm_pmu {
-	int irq_num;
+	struct irq_work overflow_work;
 	struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
 	DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS);
+	int irq_num;
 	bool created;
 	bool irq_level;
-	struct irq_work overflow_work;
 };
 
 struct arm_pmu_entry {