dm: treewide: Rename ..._platdata variables to just ..._plat

Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/nokia/rx51/rx51.c b/board/nokia/rx51/rx51.c
index 3d62b5d..bafb620 100644
--- a/board/nokia/rx51/rx51.c
+++ b/board/nokia/rx51/rx51.c
@@ -703,7 +703,7 @@
 	twl4030_power_mmc_init(1);
 }
 
-static const struct omap_i2c_platdata rx51_i2c[] = {
+static const struct omap_i2c_plat rx51_i2c[] = {
 	{ I2C_BASE1, 2200000, OMAP_I2C_REV_V1 },
 	{ I2C_BASE2, 100000, OMAP_I2C_REV_V1 },
 	{ I2C_BASE3, 400000, OMAP_I2C_REV_V1 },