sf: dataflash: Rename to CONFIG_SPI_FLASH_DATAFLASH

Rename CONFIG_SF_DATAFLASH into CONFIG_SPI_FLASH_DATAFLASH
as it follows the naming convention same as remaining configs.

Signed-off-by: Jagan Teki <jteki@openedev.com>
diff --git a/include/configs/ls1021aqds.h b/include/configs/ls1021aqds.h
index 46c609a..8a5a707 100644
--- a/include/configs/ls1021aqds.h
+++ b/include/configs/ls1021aqds.h
@@ -423,7 +423,7 @@
 #if defined(CONFIG_FSL_DSPI) || defined(CONFIG_FSL_QSPI)
 #define CONFIG_CMD_SF
 #define CONFIG_DM_SPI_FLASH
-#define CONFIG_SF_DATAFLASH
+#define CONFIG_SPI_FLASH_DATAFLASH
 #endif
 #endif