drivers: use dev_read_addr_ptr when cast to pointer

The fdt_addr_t and phys_addr_t size have been decoupled. A 32bit CPU
can expect 64-bit data from the device tree parser, so use
dev_read_addr_ptr instead of the dev_read_addr function in the
various files in the drivers directory that cast to a pointer.
As we are there also streamline the error response to -EINVAL on return.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/pwm/tegra_pwm.c

@@ -59,7 +59,7 @@ static int tegra_pwm_of_to_plat(struct udevice *dev)
 {
 	struct tegra_pwm_priv *priv = dev_get_priv(dev);
 
-	priv->regs = (struct pwm_ctlr *)dev_read_addr(dev);
+	priv->regs = dev_read_addr_ptr(dev);
 
 	return 0;
 }