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/arch/arm/mach-mvebu/sata.c b/arch/arm/mach-mvebu/sata.c
index 140a295..5d8032b 100644
--- a/arch/arm/mach-mvebu/sata.c
+++ b/arch/arm/mach-mvebu/sata.c
@@ -35,7 +35,7 @@
 	 */
 	board_ahci_enable();
 
-	ahci_init(dev_get_addr_ptr(dev));
+	ahci_init(devfdt_get_addr_ptr(dev));
 
 	return 0;
 }