[configs/*] syslinux: Use UI instead of DEFAULT for *menu.c32

* UI is more correct than DEFAULT for simple menu system.
* Remove TIMEOUT
* Remove PROMPT 0, this is the default value.
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

configs/baseline/syslinux/syslinux.cfg

-DEFAULT menu.c32
-PROMPT 0
+UI menu.c32
 MENU TITLE Arch Linux
-TIMEOUT 300
 
 LABEL arch
 MENU LABEL Arch Linux
 LINUX /%INSTALL_DIR%/boot/%ARCH%/vmlinuz
 INITRD /%INSTALL_DIR%/boot/%ARCH%/archiso.img
 APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL%
-
-ONTIMEOUT arch

configs/releng/syslinux.dual/archiso_head.cfg

 SERIAL 0 38400
-DEFAULT boot/syslinux/vesamenu.c32
-PROMPT 0
+UI boot/syslinux/vesamenu.c32
 MENU TITLE Arch Linux
 MENU BACKGROUND boot/syslinux/splash.png
-TIMEOUT 3000
 
 MENU WIDTH 78
 MENU MARGIN 4
 MENU ROWS 7
 MENU VSHIFT 10
-MENU TIMEOUTROW 13
 MENU TABMSGROW 11
 MENU CMDLINEROW 11
 MENU HELPMSGROW 16

configs/releng/syslinux.dual/archiso_tail.cfg

@@ -25,5 +25,3 @@ COM32 boot/syslinux/reboot.c32
 LABEL poweroff
 MENU LABEL Power Off
 COMBOOT boot/syslinux/poweroff.com
-
-ONTIMEOUT arch32

configs/releng/syslinux/archiso_head.cfg

 SERIAL 0 38400
-DEFAULT boot/syslinux/vesamenu.c32
-PROMPT 0
+UI boot/syslinux/vesamenu.c32
 MENU TITLE Arch Linux
 MENU BACKGROUND boot/syslinux/splash.png
-TIMEOUT 3000
 
 MENU WIDTH 78
 MENU MARGIN 4
 MENU ROWS 6
 MENU VSHIFT 10
-MENU TIMEOUTROW 13
 MENU TABMSGROW 11
 MENU CMDLINEROW 11
 MENU HELPMSGROW 16

configs/releng/syslinux/archiso_tail.cfg

@@ -25,5 +25,3 @@ COM32 boot/syslinux/reboot.c32
 LABEL poweroff
 MENU LABEL Power Off
 COMBOOT boot/syslinux/poweroff.com
-
-ONTIMEOUT arch