dm: Rename dev_addr..() functions

These support the flat device tree. We want to use the dev_read_..()
prefix for functions that support both flat tree and live tree. So rename
the existing functions to avoid confusion.

In the end we will have:

   1. dev_read_addr...()    - works on devices, supports flat/live tree
   2. devfdt_get_addr...()  - current functions, flat tree only
   3. of_get_address() etc. - new functions, live tree only

All drivers will be written to use 1. That function will in turn call
either 2 or 3 depending on whether the flat or live tree is in use.

Note this involves changing some dead code - the imx_lpi2c.c file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index a5c6d34..f6c6b01 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -96,7 +96,7 @@
 	/*
 	 * Get the base address for EHCI controller from the device node
 	 */
-	hcd_base = dev_get_addr(dev);
+	hcd_base = devfdt_get_addr(dev);
 	if (hcd_base == FDT_ADDR_T_NONE) {
 		debug("Can't get the EHCI register base address\n");
 		return -ENXIO;