dm: Avoid accessing seq directly

At present various drivers etc. access the device's 'seq' member directly.
This makes it harder to change the meaning of that member. Change access
to go through a function instead.

The drivers/i2c/lpc32xx_i2c.c file is left unchanged for now.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pci/pcie_fsl.c b/drivers/pci/pcie_fsl.c
index 2bb91ce..b061b31 100644
--- a/drivers/pci/pcie_fsl.c
+++ b/drivers/pci/pcie_fsl.c
@@ -29,16 +29,16 @@
 	if (!pcie->enabled)
 		return -ENXIO;
 
-	if (PCI_BUS(bdf) < bus->seq)
+	if (PCI_BUS(bdf) < dev_seq(bus))
 		return -EINVAL;
 
-	if (PCI_BUS(bdf) > bus->seq && (!fsl_pcie_link_up(pcie) || pcie->mode))
+	if (PCI_BUS(bdf) > dev_seq(bus) && (!fsl_pcie_link_up(pcie) || pcie->mode))
 		return -EINVAL;
 
-	if (PCI_BUS(bdf) == bus->seq && (PCI_DEV(bdf) > 0 || PCI_FUNC(bdf) > 0))
+	if (PCI_BUS(bdf) == dev_seq(bus) && (PCI_DEV(bdf) > 0 || PCI_FUNC(bdf) > 0))
 		return -EINVAL;
 
-	if (PCI_BUS(bdf) == (bus->seq + 1) && (PCI_DEV(bdf) > 0))
+	if (PCI_BUS(bdf) == (dev_seq(bus) + 1) && (PCI_DEV(bdf) > 0))
 		return -EINVAL;
 
 	return 0;
@@ -57,7 +57,7 @@
 		return 0;
 	}
 
-	bdf = bdf - PCI_BDF(bus->seq, 0, 0);
+	bdf = bdf - PCI_BDF(dev_seq(bus), 0, 0);
 	val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
 	out_be32(&regs->cfg_addr, val);
 
@@ -93,7 +93,7 @@
 	if (fsl_pcie_addr_valid(pcie, bdf))
 		return 0;
 
-	bdf = bdf - PCI_BDF(bus->seq, 0, 0);
+	bdf = bdf - PCI_BDF(dev_seq(bus), 0, 0);
 	val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
 	out_be32(&regs->cfg_addr, val);
 
@@ -123,7 +123,7 @@
 	int ret;
 	struct udevice *bus = pcie->bus;
 
-	ret = fsl_pcie_read_config(bus, PCI_BDF(bus->seq, 0, 0),
+	ret = fsl_pcie_read_config(bus, PCI_BDF(dev_seq(bus), 0, 0),
 				   offset, valuep, size);
 
 	return ret;
@@ -134,7 +134,7 @@
 {
 	struct udevice *bus = pcie->bus;
 
-	return fsl_pcie_write_config(bus, PCI_BDF(bus->seq, 0, 0),
+	return fsl_pcie_write_config(bus, PCI_BDF(dev_seq(bus), 0, 0),
 				     offset, value, size);
 }