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/davinci_spi.c b/drivers/spi/davinci_spi.c
index 65d37b0..291ef95 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -542,7 +542,7 @@
 	const void *blob = gd->fdt_blob;
 	int node = dev_of_offset(bus);
 
-	ds->regs = dev_map_physmem(bus, sizeof(struct davinci_spi_regs));
+	ds->regs = devfdt_map_physmem(bus, sizeof(struct davinci_spi_regs));
 	if (!ds->regs) {
 		printf("%s: could not map device address\n", __func__);
 		return -EINVAL;