Fix Manual(s) -- Advanced Keylock

Manuals were showing Advanced Keylock even for devices that don't support it

Change-Id: I8e40a76bcbba9c67a4680d505c507a0b09f7f203
diff --git a/manual/configure_rockbox/system_options.tex b/manual/configure_rockbox/system_options.tex
index ff2967c..1733a9b 100755
--- a/manual/configure_rockbox/system_options.tex
+++ b/manual/configure_rockbox/system_options.tex
@@ -244,7 +244,7 @@
 
 
 
-\nopt{HAS_BUTTON_HOLD}{
+\nopt{hold_button}{
   \subsection{Advanced Key Lock}
     This option allows users to select actions that when within WPS or FMS will \emph{not} be
     blocked by the key lock (software hold switch).
@@ -295,7 +295,7 @@
         Note: If all options get de-selected, the entire feature is disabled.
 
         \end{description}
-} %\nopt{HAS_BUTTON_HOLD}
+} %\nopt{hold_button}
 
 
 \opt{usb_hid}{