dm: Rename dev_get_parentdata() to dev_get_parent_priv()

The current name is inconsistent with other driver model data access
functions. Rename it and fix up all users.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/spi/soft_spi.c b/drivers/spi/soft_spi.c
index 6ae45f5..aa4abcc 100644
--- a/drivers/spi/soft_spi.c
+++ b/drivers/spi/soft_spi.c
@@ -200,7 +200,7 @@
 
 static int soft_spi_probe(struct udevice *dev)
 {
-	struct spi_slave *slave = dev_get_parentdata(dev);
+	struct spi_slave *slave = dev_get_parent_priv(dev);
 	struct soft_spi_platdata *plat = dev->platdata;
 	int cs_flags, clk_flags;