Moved SPI flash clock to 16Mhz, matching the kernel

Change-Id: Ia2da0769dd5e1b93e5cad443099de2c47ac2cb3a
diff --git a/include/configs/mv_kw2.h b/include/configs/mv_kw2.h
index cba7988..6353cd6 100644
--- a/include/configs/mv_kw2.h
+++ b/include/configs/mv_kw2.h
@@ -451,7 +451,8 @@
 	#define CONFIG_SPI_FLASH_STMICRO
 	#define CONFIG_SPI_FLASH_MACRONIX
 
-	#define CONFIG_ENV_SPI_MAX_HZ		20000000	/*Max 50Mhz- will sattle on SPI bus max 41.5Mhz */
+	#define CONFIG_SF_DEFAULT_SPEED		_16M
+	#define CONFIG_ENV_SPI_MAX_HZ		_16M		/*Max 50Mhz- will settle on SPI bus max 41.5Mhz */
 	#define CONFIG_ENV_SPI_CS		0
 	#define CONFIG_ENV_SPI_BUS		0
 	//#define MV_SPI_CONN_TO_EXT_FLASH