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>

drivers/timer/ast_timer.c

@@ -66,7 +66,7 @@ static int ast_timer_ofdata_to_platdata(struct udevice *dev)
 {
 	struct ast_timer_priv *priv = dev_get_priv(dev);
 
-	priv->regs = dev_get_addr_ptr(dev);
+	priv->regs = devfdt_get_addr_ptr(dev);
 	if (IS_ERR(priv->regs))
 		return PTR_ERR(priv->regs);