autoboot: fix MENUKEY

replace CONFIG_AUTOBOOT_USE_MENUKEY with CONFIG_AUTOBOOT_MENUKEY

Signed-off-by: Da Xue <da@libre.computer>
diff --git a/common/autoboot.c b/common/autoboot.c
index c0b71af..b42148c 100644
--- a/common/autoboot.c
+++ b/common/autoboot.c
@@ -45,7 +45,7 @@
 #endif
 
 #ifdef CONFIG_AUTOBOOT_USE_MENUKEY
-#define AUTOBOOT_MENUKEY CONFIG_AUTOBOOT_USE_MENUKEY
+#define AUTOBOOT_MENUKEY CONFIG_AUTOBOOT_MENUKEY
 #else
 #define AUTOBOOT_MENUKEY 0
 #endif