device/pci: Fix PCI accessor headers

PCI config accessors are no longer indirectly included
from <arch/io.h> use <device/pci_ops.h> instead.

Change-Id: I2adf46430a33bc52ef69d1bf7dca4655fc8475bd
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/31675
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/soc/intel/skylake/pmutil.c

@@ -21,6 +21,7 @@
 
 #include <arch/acpi.h>
 #include <arch/io.h>
+#include <device/pci_ops.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_def.h>