KVM: arm64: vgic-its: Fix vgic_its_check_device_id BE handling

The ITS tables are stored in LE format. If the host is reading
a L1 table entry to check its validity, it must convert it to
the CPU endianness.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

virt/kvm/arm/vgic/vgic-its.c

@@ -707,6 +707,8 @@ static bool vgic_its_check_device_id(struct kvm *kvm, struct vgic_its *its,
 			   &indirect_ptr, sizeof(indirect_ptr)))
 		return false;
 
+	indirect_ptr = le64_to_cpu(indirect_ptr);
+
 	/* check the valid bit of the first level entry */
 	if (!(indirect_ptr & BIT_ULL(63)))
 		return false;