dtoc: Rename dt-platdata.c to dt-plat.c

Use this new name to be consistent with the rest of U-Boot, which talks
about 'plat' for the platform data, which is what this file holds.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/platdata.h b/include/dm/platdata.h
index df1f6ab..dc3cbfc 100644
--- a/include/dm/platdata.h
+++ b/include/dm/platdata.h
@@ -59,7 +59,7 @@
  * When of-platdata is in use, U_BOOT_DRVINFO() cannot be used outside of the
  * dt-plat.c file created by dtoc
  */
-#if CONFIG_IS_ENABLED(OF_PLATDATA) && !defined(DT_PLATDATA_C)
+#if CONFIG_IS_ENABLED(OF_PLATDATA) && !defined(DT_PLAT_C)
 #define U_BOOT_DRVINFO(__name)	_Static_assert(false, \
 	"Cannot use U_BOOT_DRVINFO with of-platdata. Please use devicetree instead")
 #else
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 363f274..4a8e19e 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -262,7 +262,7 @@
  *	Defined below (keep this text to enable searching for spi_flash decl)
  * }
  */
-#ifndef DT_PLATDATA_C
+#ifndef DT_PLAT_C
 #define spi_flash spi_nor
 #endif