device: Use pcidev_on_root()

Change-Id: Icf34b39d80f6e46d32a39b68f38fb2752c0bcebc
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/26484
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Piotr Król <piotr.krol@3mdeb.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/northbridge/intel/gm45/northbridge.c b/src/northbridge/intel/gm45/northbridge.c
index 014de26..7ff046e 100644
--- a/src/northbridge/intel/gm45/northbridge.c
+++ b/src/northbridge/intel/gm45/northbridge.c
@@ -41,7 +41,7 @@
 	*base = 0;
 	*len = 0;
 
-	struct device *dev = dev_find_slot(0, PCI_DEVFN(0, 0));
+	struct device *dev = pcidev_on_root(0, 0);
 	if (!dev)
 		return 0;
 
@@ -95,7 +95,7 @@
 
 	pci_domain_read_resources(dev);
 
-	struct device *mch = dev_find_slot(0, PCI_DEVFN(0, 0));
+	struct device *mch = pcidev_on_root(0, 0);
 
 	/* Top of Upper Usable DRAM, including remap */
 	touud = pci_read_config16(mch, D0F0_TOUUD);
@@ -196,7 +196,7 @@
 {
 	u32 reg32;
 
-	struct device *mch = dev_find_slot(0, PCI_DEVFN(0, 0));
+	struct device *mch = pcidev_on_root(0, 0);
 
 	/* Enable SERR */
 	reg32 = pci_read_config32(mch, PCI_COMMAND);
@@ -222,7 +222,7 @@
 
 void northbridge_write_smram(u8 smram)
 {
-	struct device *dev = dev_find_slot(0, PCI_DEVFN(0, 0));
+	struct device *dev = pcidev_on_root(0, 0);
 
 	if (dev == NULL)
 		die("could not find pci 00:00.0!\n");
@@ -309,7 +309,7 @@
 		}
 		for (; fn >= 0; --fn) {
 			const struct device *const d =
-				dev_find_slot(0, PCI_DEVFN(dev, fn));
+				pcidev_on_root(dev, fn);
 			if (!d || d->enabled) continue;
 			const u32 deven = pci_read_config32(d0f0, D0F0_DEVEN);
 			pci_write_config32(d0f0, D0F0_DEVEN,