x86: Add proper vector accounting for HYPERVISOR_CALLBACK_VECTOR

x86: Add proper vector accounting for HYPERVISOR_CALLBACK_VECTOR

HyperV abuses a device interrupt to account for the
HYPERVISOR_CALLBACK_VECTOR.

Provide proper accounting as we have for the other vectors as well.

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: K. Y. Srinivasan <[email protected]>
Cc: x86 <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>