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/spi/tegra20_sflash.c b/drivers/spi/tegra20_sflash.c
index ecbf4c1..299e1b4 100644
--- a/drivers/spi/tegra20_sflash.c
+++ b/drivers/spi/tegra20_sflash.c
@@ -90,7 +90,7 @@
 	const void *blob = gd->fdt_blob;
 	int node = dev_of_offset(bus);
 
-	plat->base = dev_get_addr(bus);
+	plat->base = devfdt_get_addr(bus);
 	plat->periph_id = clock_decode_periph_id(blob, node);
 
 	if (plat->periph_id == PERIPH_ID_NONE) {