PCI: dwc: Clean up dw_pcie_ep_raise_msi_irq() alignment

I recently changed the alignment code in dw_pcie_ep_raise_msix_irq().  The
code in dw_pcie_ep_raise_msi_irq() is similar, so update it to match, just
for consistency.  (No effect on runtime, just a cleanup).

Link: https://lore.kernel.org/r/184097e0-c728-42c7-9e8a-556bd33fb612@moroto.mountain


Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>