KVM: arm64: Delete pointless switch statement in kvm_reset_vcpu()

The vCPU target hasn't mattered for quite a long time now. Delete the
useless switch statement in kvm_reset_vcpu(), which hilariously only had
a default case in it.
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230710193140.1706399-2-oliver.upton@linux.dev

arch/arm64/kvm/reset.c

@@ -248,21 +248,16 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
 		}
 	}
 
-	switch (vcpu->arch.target) {
-	default:
-		if (vcpu_el1_is_32bit(vcpu)) {
-			pstate = VCPU_RESET_PSTATE_SVC;
-		} else if (vcpu_has_nv(vcpu)) {
-			pstate = VCPU_RESET_PSTATE_EL2;
-		} else {
-			pstate = VCPU_RESET_PSTATE_EL1;
-		}
-
-		if (kvm_vcpu_has_pmu(vcpu) && !kvm_arm_support_pmu_v3()) {
-			ret = -EINVAL;
-			goto out;
-		}
-		break;
+	if (vcpu_el1_is_32bit(vcpu))
+		pstate = VCPU_RESET_PSTATE_SVC;
+	else if (vcpu_has_nv(vcpu))
+		pstate = VCPU_RESET_PSTATE_EL2;
+	else
+		pstate = VCPU_RESET_PSTATE_EL1;
+
+	if (kvm_vcpu_has_pmu(vcpu) && !kvm_arm_support_pmu_v3()) {
+		ret = -EINVAL;
+		goto out;
 	}
 
 	/* Reset core registers */