dm: Use dev_get_addr() where possible

This is a convenient way for a driver to get the hardware address of a
device, when regmap or syscon are not being used. Change existing callers
to use it as an example to others.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
diff --git a/drivers/spi/tegra20_slink.c b/drivers/spi/tegra20_slink.c
index f6fb89b..fbb665b 100644
--- a/drivers/spi/tegra20_slink.c
+++ b/drivers/spi/tegra20_slink.c
@@ -106,7 +106,7 @@
 	const void *blob = gd->fdt_blob;
 	int node = bus->of_offset;
 
-	plat->base = fdtdec_get_addr(blob, node, "reg");
+	plat->base = dev_get_addr(bus);
 	plat->periph_id = clock_decode_periph_id(blob, node);
 
 	if (plat->periph_id == PERIPH_ID_NONE) {