dm: treewide: Rename 'platdata' variables to just 'plat'

We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index 31003b3..658fd92 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -2029,7 +2029,7 @@
 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 	.of_match = omap_hsmmc_ids,
 	.ofdata_to_platdata = omap_hsmmc_ofdata_to_platdata,
-	.platdata_auto	= sizeof(struct omap_hsmmc_plat),
+	.plat_auto	= sizeof(struct omap_hsmmc_plat),
 #endif
 #ifdef CONFIG_BLK
 	.bind = omap_hsmmc_bind,