treewide: Use OF_REAL instead of !OF_PLATDATA

Now that we have a 'positive' Kconfig option, use this instead of the
negative one, which is harder to understand.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pinctrl/nxp/pinctrl-mxs.c b/drivers/pinctrl/nxp/pinctrl-mxs.c
index e6b10a3..9a54b8b 100644
--- a/drivers/pinctrl/nxp/pinctrl-mxs.c
+++ b/drivers/pinctrl/nxp/pinctrl-mxs.c
@@ -186,7 +186,7 @@
 	.id = UCLASS_PINCTRL,
 	.of_match = of_match_ptr(mxs_pinctrl_match),
 	.probe = mxs_pinctrl_probe,
-#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+#if CONFIG_IS_ENABLED(OF_REAL)
 	.bind		= dm_scan_fdt_dev,
 #endif
 	.priv_auto	= sizeof(struct mxs_pinctrl_priv),