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>
diff --git a/src/mainboard/lenovo/t420s/romstage.c b/src/mainboard/lenovo/t420s/romstage.c
index 5754a6d..1a7d341 100644
--- a/src/mainboard/lenovo/t420s/romstage.c
+++ b/src/mainboard/lenovo/t420s/romstage.c
@@ -17,6 +17,7 @@
 
 #include <arch/byteorder.h>
 #include <arch/io.h>
+#include <device/pci_ops.h>
 #include <northbridge/intel/sandybridge/raminit_native.h>
 #include <southbridge/intel/bd82x6x/pch.h>
 #include <drivers/lenovo/hybrid_graphics/hybrid_graphics.h>