[PATCH] cxl: fix sparse warnings

[Matthew R. Ochs]

> On Jul 22, 2016, at 4:01 AM, Andrew Donnellan <andrew.donnellan at au1.ibm.com> wrote:
> 
> Make native_irq_wait() static and use NULL rather than 0 to initialise
> phb->cfg_data in cxl_pci_vphb_add() to remove sparse warnings.
> 
> Signed-off-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>

Reviewed-by: Matthew R. Ochs <mrochs at linux.vnet.ibm.com>