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/fsl_qspi.c b/drivers/spi/fsl_qspi.c
index 868df5f..02b557f 100644
--- a/drivers/spi/fsl_qspi.c
+++ b/drivers/spi/fsl_qspi.c
@@ -913,7 +913,7 @@
 #else
 static int fsl_qspi_child_pre_probe(struct udevice *dev)
 {
-	struct spi_slave *slave = dev_get_parentdata(dev);
+	struct spi_slave *slave = dev_get_parent_priv(dev);
 
 	slave->max_write_size = TX_BUFFER_SIZE;