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/mailbox/tegra-hsp.c

@@ -153,7 +153,7 @@ static int tegra_hsp_probe(struct udevice *dev)
 
 	debug("%s(dev=%p)\n", __func__, dev);
 
-	thsp->regs = dev_get_addr(dev);
+	thsp->regs = devfdt_get_addr(dev);
 	if (thsp->regs == FDT_ADDR_T_NONE)
 		return -ENODEV;