Typo fix: use CONFIG_SOC_DM644X, not CONFIG_SOC_DM646.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Scott Wood <scottwood@freescale.com>

drivers/mtd/nand/davinci_nand.c

@@ -182,7 +182,7 @@ static void nand_flash_init(void)
 	 * knowledge of the clocks and what devices are hooked up ... and
 	 * don't even do that unless no UBL handled it.
 	 */
-#ifdef CONFIG_SOC_DM6446
+#ifdef CONFIG_SOC_DM644X
 	u_int32_t	acfg1 = 0x3ffffffc;
 
 	/*------------------------------------------------------------------*