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/i2c/at91_i2c.c b/drivers/i2c/at91_i2c.c
index 5a63669..b7298cf 100644
--- a/drivers/i2c/at91_i2c.c
+++ b/drivers/i2c/at91_i2c.c
@@ -244,7 +244,7 @@
 	struct at91_i2c_bus *bus = dev_get_priv(dev);
 	int node = dev_of_offset(dev);
 
-	bus->regs = (struct at91_i2c_regs *)dev_get_addr(dev);
+	bus->regs = (struct at91_i2c_regs *)devfdt_get_addr(dev);
 	bus->pdata = (struct at91_i2c_pdata *)dev_get_driver_data(dev);
 	bus->clock_frequency = fdtdec_get_int(blob, node,
 					      "clock-frequency", 100000);