ti816x_evm: Change CONFIG_CMD_ASKEN to CONFIG_CMD_ASKENV

This looks like a typo. Fix it.
Signed-off-by: NSimon Glass <sjg@chromium.org>

include/configs/ti816x_evm.h

@@ -49,7 +49,7 @@
 
 #define CONFIG_SYS_LOAD_ADDR		0x81000000 /* Default load address */
 
-#define CONFIG_CMD_ASKEN
+#define CONFIG_CMD_ASKENV
 #define CONFIG_OMAP_GPIO
 
 #define CONFIG_FS_FAT

scripts/config_whitelist.txt

@@ -393,7 +393,6 @@ CONFIG_CM922T_XA10
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_ASKEN
 CONFIG_CMD_BAT
 CONFIG_CMD_BEDBUG
 CONFIG_CMD_BLOB